diff --git a/extensions/cornerstone-dicom-rt/src/utils/promptHydrateRT.ts b/extensions/cornerstone-dicom-rt/src/utils/promptHydrateRT.ts
index 4af78caeeb7..29e99bd044b 100644
--- a/extensions/cornerstone-dicom-rt/src/utils/promptHydrateRT.ts
+++ b/extensions/cornerstone-dicom-rt/src/utils/promptHydrateRT.ts
@@ -1,3 +1,4 @@
+import { ButtonEnums } from '@ohif/ui';
 import hydrateRTDisplaySet from './_hydrateRT';
 
 const RESPONSE = {
@@ -38,12 +39,12 @@ function _askHydrate(uiViewportDialogService, viewportIndex) {
     const message = 'Do you want to open this Segmentation?';
     const actions = [
       {
-        type: 'secondary',
+        type: ButtonEnums.type.secondary,
         text: 'No',
         value: RESPONSE.CANCEL,
       },
       {
-        type: 'primary',
+        type: ButtonEnums.type.primary,
         text: 'Yes',
         value: RESPONSE.HYDRATE_SEG,
       },
diff --git a/extensions/cornerstone-dicom-seg/src/panels/callInputDialog.tsx b/extensions/cornerstone-dicom-seg/src/panels/callInputDialog.tsx
index 69c30346975..6909d93fcde 100644
--- a/extensions/cornerstone-dicom-seg/src/panels/callInputDialog.tsx
+++ b/extensions/cornerstone-dicom-seg/src/panels/callInputDialog.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Input, Dialog } from '@ohif/ui';
+import { Input, Dialog, ButtonEnums } from '@ohif/ui';
 
 function callInputDialog(uiDialogService, label, callback) {
   const dialogId = 'enter-segment-label';
@@ -29,8 +29,8 @@ function callInputDialog(uiDialogService, label, callback) {
         noCloseButton: true,
         onClose: () => uiDialogService.dismiss({ id: dialogId }),
         actions: [
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Confirm', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Confirm', type: ButtonEnums.type.primary },
         ],
         onSubmit: onSubmitHandler,
         body: ({ value, setValue }) => {
diff --git a/extensions/cornerstone-dicom-seg/src/utils/promptHydrateSEG.ts b/extensions/cornerstone-dicom-seg/src/utils/promptHydrateSEG.ts
index c0b9385f130..7d6ee24523a 100644
--- a/extensions/cornerstone-dicom-seg/src/utils/promptHydrateSEG.ts
+++ b/extensions/cornerstone-dicom-seg/src/utils/promptHydrateSEG.ts
@@ -1,3 +1,4 @@
+import { ButtonEnums } from '@ohif/ui';
 import hydrateSEGDisplaySet from './_hydrateSEG';
 
 const RESPONSE = {
@@ -6,11 +7,7 @@ const RESPONSE = {
   HYDRATE_SEG: 5,
 };
 
-function promptHydrateSEG({
-  servicesManager,
-  segDisplaySet,
-  viewportIndex,
-}) {
+function promptHydrateSEG({ servicesManager, segDisplaySet, viewportIndex }) {
   const { uiViewportDialogService } = servicesManager.services;
 
   return new Promise(async function(resolve, reject) {
@@ -36,12 +33,12 @@ function _askHydrate(uiViewportDialogService, viewportIndex) {
     const message = 'Do you want to open this Segmentation?';
     const actions = [
       {
-        type: 'secondary',
+        type: ButtonEnums.type.secondary,
         text: 'No',
         value: RESPONSE.CANCEL,
       },
       {
-        type: 'primary',
+        type: ButtonEnums.type.primary,
         text: 'Yes',
         value: RESPONSE.HYDRATE_SEG,
       },
diff --git a/extensions/cornerstone/src/components/DicomUpload/DicomUpload.tsx b/extensions/cornerstone/src/components/DicomUpload/DicomUpload.tsx
index 26e596e9522..e90728cb368 100644
--- a/extensions/cornerstone/src/components/DicomUpload/DicomUpload.tsx
+++ b/extensions/cornerstone/src/components/DicomUpload/DicomUpload.tsx
@@ -5,7 +5,7 @@ import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import DicomFileUploader from '../../utils/DicomFileUploader';
 import DicomUploadProgress from './DicomUploadProgress';
-import { Button } from '@ohif/ui';
+import { Button, ButtonEnums } from '@ohif/ui';
 import './DicomUpload.css';
 
 type DicomUploadProps = {
@@ -46,12 +46,7 @@ function DicomUpload({
               <Dropzone onDrop={onDrop} noDrag>
                 {({ getRootProps, getInputProps }) => (
                   <div {...getRootProps()}>
-                    <Button
-                      variant="contained"
-                      color="primary"
-                      disabled={false}
-                      onClick={() => {}}
-                    >
+                    <Button disabled={false} onClick={() => {}}>
                       {'Add files'}
                       <input {...getInputProps()} />
                     </Button>
@@ -62,9 +57,7 @@ function DicomUpload({
                 {({ getRootProps, getInputProps }) => (
                   <div {...getRootProps()}>
                     <Button
-                      variant="contained"
-                      color="primaryDark"
-                      border="primaryActive"
+                      type={ButtonEnums.type.secondary}
                       disabled={false}
                       onClick={() => {}}
                     >
diff --git a/extensions/cornerstone/src/components/DicomUpload/DicomUploadProgress.tsx b/extensions/cornerstone/src/components/DicomUpload/DicomUploadProgress.tsx
index d16ee4b9f05..6fd14823abf 100644
--- a/extensions/cornerstone/src/components/DicomUpload/DicomUploadProgress.tsx
+++ b/extensions/cornerstone/src/components/DicomUpload/DicomUploadProgress.tsx
@@ -308,13 +308,7 @@ function DicomUploadProgress({
             } ${
               dicomFileUploaderArr.length > 1 ? 'files' : 'file'
             } completed.`}</span>
-            <Button
-              variant="contained"
-              color="primary"
-              disabled={false}
-              className="ml-auto"
-              onClick={onComplete}
-            >
+            <Button disabled={false} className="ml-auto" onClick={onComplete}>
               {'Close'}
             </Button>
           </>
diff --git a/extensions/cornerstone/src/utils/callInputDialog.tsx b/extensions/cornerstone/src/utils/callInputDialog.tsx
index b141ece63b5..efcd83c3ccc 100644
--- a/extensions/cornerstone/src/utils/callInputDialog.tsx
+++ b/extensions/cornerstone/src/utils/callInputDialog.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Input, Dialog } from '@ohif/ui';
+import { Input, Dialog, ButtonEnums } from '@ohif/ui';
 
 /**
  *
@@ -60,8 +60,8 @@ function callInputDialog(
         noCloseButton: true,
         onClose: () => uiDialogService.dismiss({ id: dialogId }),
         actions: [
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Save', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
         ],
         onSubmit: onSubmitHandler,
         body: ({ value, setValue }) => {
diff --git a/extensions/default/src/Panels/ActionButtons.tsx b/extensions/default/src/Panels/ActionButtons.tsx
index f372a1ee086..133f2b81409 100644
--- a/extensions/default/src/Panels/ActionButtons.tsx
+++ b/extensions/default/src/Panels/ActionButtons.tsx
@@ -2,7 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
 
-import { Button, ButtonGroup } from '@ohif/ui';
+import { LegacyButton, ButtonGroup } from '@ohif/ui';
 
 function ActionButtons({ onExportClick, onCreateReportClick }) {
   const { t } = useTranslation('MeasurementTable');
@@ -10,12 +10,16 @@ function ActionButtons({ onExportClick, onCreateReportClick }) {
   return (
     <React.Fragment>
       <ButtonGroup color="black" size="inherit">
-        <Button className="px-2 py-2 text-base" onClick={onExportClick}>
+        {/* TODO Revisit design of ButtonGroup later - for now use LegacyButton for its children.*/}
+        <LegacyButton className="px-2 py-2 text-base" onClick={onExportClick}>
           {t('Export CSV')}
-        </Button>
-        <Button className="px-2 py-2 text-base" onClick={onCreateReportClick}>
+        </LegacyButton>
+        <LegacyButton
+          className="px-2 py-2 text-base"
+          onClick={onCreateReportClick}
+        >
           {t('Create Report')}
-        </Button>
+        </LegacyButton>
       </ButtonGroup>
     </React.Fragment>
   );
diff --git a/extensions/default/src/Panels/DataSourceSelector.tsx b/extensions/default/src/Panels/DataSourceSelector.tsx
index decb24ad83d..06ed1890955 100644
--- a/extensions/default/src/Panels/DataSourceSelector.tsx
+++ b/extensions/default/src/Panels/DataSourceSelector.tsx
@@ -3,7 +3,7 @@ import classnames from 'classnames';
 import { useNavigate } from 'react-router-dom';
 import { useAppConfig } from '@state';
 
-import { Button } from '@ohif/ui';
+import { Button, ButtonEnums } from '@ohif/ui';
 
 function DataSourceSelector() {
   const [appConfig] = useAppConfig();
@@ -33,7 +33,8 @@ function DataSourceSelector() {
                 <div key={ds.sourceName}>
                   <h1 className="text-white">{ds.friendlyName}</h1>
                   <Button
-                    className={classnames('font-bold', 'ml-2')}
+                    type={ButtonEnums.type.primary}
+                    className={classnames('ml-2')}
                     onClick={() => {
                       navigate({
                         pathname: '/',
diff --git a/extensions/default/src/Panels/PanelMeasurementTable.tsx b/extensions/default/src/Panels/PanelMeasurementTable.tsx
index 20021814634..203531845f7 100644
--- a/extensions/default/src/Panels/PanelMeasurementTable.tsx
+++ b/extensions/default/src/Panels/PanelMeasurementTable.tsx
@@ -1,7 +1,13 @@
 import React, { useEffect, useState } from 'react';
 import PropTypes from 'prop-types';
 import { utils, ServicesManager } from '@ohif/core';
-import { MeasurementTable, Dialog, Input, useViewportGrid } from '@ohif/ui';
+import {
+  MeasurementTable,
+  Dialog,
+  Input,
+  useViewportGrid,
+  ButtonEnums,
+} from '@ohif/ui';
 import ActionButtons from './ActionButtons';
 import debounce from 'lodash.debounce';
 
@@ -189,9 +195,8 @@ export default function PanelMeasurementTable({
           );
         },
         actions: [
-          // temp: swap button types until colors are updated
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Save', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
         ],
         onSubmit: onSubmitHandler,
       },
diff --git a/extensions/default/src/Panels/createReportDialogPrompt.tsx b/extensions/default/src/Panels/createReportDialogPrompt.tsx
index 51289287c7c..166b4b0c4bc 100644
--- a/extensions/default/src/Panels/createReportDialogPrompt.tsx
+++ b/extensions/default/src/Panels/createReportDialogPrompt.tsx
@@ -1,6 +1,6 @@
 /* eslint-disable react/display-name */
 import React from 'react';
-import { Dialog, Input, Select } from '@ohif/ui';
+import { ButtonEnums, Dialog, Input, Select } from '@ohif/ui';
 
 export const CREATE_REPORT_DIALOG_RESPONSE = {
   CANCEL: 0,
@@ -81,8 +81,8 @@ export default function createReportDialogPrompt(
         noCloseButton: true,
         onClose: _handleClose,
         actions: [
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Save', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
         ],
         // TODO: Should be on button press...
         onSubmit: _handleFormSubmit,
diff --git a/extensions/dicom-microscopy/src/utils/callInputDialog.tsx b/extensions/dicom-microscopy/src/utils/callInputDialog.tsx
index 2b6554944ac..5a746b7bd2d 100644
--- a/extensions/dicom-microscopy/src/utils/callInputDialog.tsx
+++ b/extensions/dicom-microscopy/src/utils/callInputDialog.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Input, Dialog } from '@ohif/ui';
+import { Input, Dialog, ButtonEnums } from '@ohif/ui';
 
 /**
  *
@@ -14,7 +14,7 @@ export default function callInputDialog({
   uiDialogService,
   title = 'Annotation',
   defaultValue = '',
-  callback = (value: string, action: string) => {}
+  callback = (value: string, action: string) => {},
 }) {
   const dialogId = 'microscopy-input-dialog';
 
@@ -43,8 +43,8 @@ export default function callInputDialog({
         noCloseButton: true,
         onClose: () => uiDialogService.dismiss({ id: dialogId }),
         actions: [
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Save', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
         ],
         onSubmit: onSubmitHandler,
         body: ({ value, setValue }) => {
diff --git a/extensions/measurement-tracking/src/_shared/createReportDialogPrompt.tsx b/extensions/measurement-tracking/src/_shared/createReportDialogPrompt.tsx
index f206e6c14f9..8e481e261bb 100644
--- a/extensions/measurement-tracking/src/_shared/createReportDialogPrompt.tsx
+++ b/extensions/measurement-tracking/src/_shared/createReportDialogPrompt.tsx
@@ -1,6 +1,6 @@
 /* eslint-disable react/display-name */
 import React from 'react';
-import { Dialog, Input } from '@ohif/ui';
+import { ButtonEnums, Dialog, Input } from '@ohif/ui';
 import RESPONSE from './PROMPT_RESPONSES';
 
 export default function createReportDialogPrompt(uiDialogService) {
@@ -43,8 +43,8 @@ export default function createReportDialogPrompt(uiDialogService) {
         noCloseButton: true,
         onClose: _handleClose,
         actions: [
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Save', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
         ],
         // TODO: Should be on button press...
         onSubmit: _handleFormSubmit,
diff --git a/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptBeginTracking.js b/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptBeginTracking.js
index 75d7db2d7a8..4197dd7f1ea 100644
--- a/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptBeginTracking.js
+++ b/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptBeginTracking.js
@@ -1,3 +1,5 @@
+import { ButtonEnums } from '@ohif/ui';
+
 const RESPONSE = {
   NO_NEVER: -1,
   CANCEL: 0,
@@ -31,19 +33,19 @@ function _askTrackMeasurements(uiViewportDialogService, viewportIndex) {
     const actions = [
       {
         id: 'prompt-begin-tracking-cancel',
-        type: 'cancel',
+        type: ButtonEnums.type.secondary,
         text: 'No',
         value: RESPONSE.CANCEL,
       },
       {
         id: 'prompt-begin-tracking-no-do-not-ask-again',
-        type: 'secondary',
+        type: ButtonEnums.type.secondary,
         text: 'No, do not ask again',
         value: RESPONSE.NO_NEVER,
       },
       {
         id: 'prompt-begin-tracking-yes',
-        type: 'primary',
+        type: ButtonEnums.type.primary,
         text: 'Yes',
         value: RESPONSE.SET_STUDY_AND_SERIES,
       },
diff --git a/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptHydrateStructuredReport.js b/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptHydrateStructuredReport.js
index 52d139c5524..3eb35c33ad2 100644
--- a/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptHydrateStructuredReport.js
+++ b/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptHydrateStructuredReport.js
@@ -1,4 +1,5 @@
 import { hydrateStructuredReport } from '@ohif/extension-cornerstone-dicom-sr';
+import { ButtonEnums } from '@ohif/ui';
 
 const RESPONSE = {
   NO_NEVER: -1,
@@ -61,12 +62,12 @@ function _askTrackMeasurements(uiViewportDialogService, viewportIndex) {
       'Do you want to continue tracking measurements for this study?';
     const actions = [
       {
-        type: 'secondary',
+        type: ButtonEnums.type.secondary,
         text: 'No',
         value: RESPONSE.CANCEL,
       },
       {
-        type: 'primary',
+        type: ButtonEnums.type.primary,
         text: 'Yes',
         value: RESPONSE.HYDRATE_REPORT,
       },
diff --git a/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptTrackNewSeries.js b/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptTrackNewSeries.js
index 1016212a9ef..005c329a59a 100644
--- a/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptTrackNewSeries.js
+++ b/extensions/measurement-tracking/src/contexts/TrackedMeasurementsContext/promptTrackNewSeries.js
@@ -1,3 +1,5 @@
+import { ButtonEnums } from '@ohif/ui';
+
 const RESPONSE = {
   NO_NEVER: -1,
   CANCEL: 0,
@@ -38,14 +40,18 @@ function _askShouldAddMeasurements(uiViewportDialogService, viewportIndex) {
     const message =
       'Do you want to add this measurement to the existing report?';
     const actions = [
-      { type: 'cancel', text: 'Cancel', value: RESPONSE.CANCEL },
       {
-        type: 'secondary',
+        type: ButtonEnums.type.secondary,
+        text: 'Cancel',
+        value: RESPONSE.CANCEL,
+      },
+      {
+        type: ButtonEnums.type.primary,
         text: 'Create new report',
         value: RESPONSE.CREATE_REPORT,
       },
       {
-        type: 'primary',
+        type: ButtonEnums.type.primary,
         text: 'Add to existing report',
         value: RESPONSE.ADD_SERIES,
       },
diff --git a/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/ActionButtons.tsx b/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/ActionButtons.tsx
index 73fae10e5dd..0c5f39dce80 100644
--- a/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/ActionButtons.tsx
+++ b/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/ActionButtons.tsx
@@ -2,7 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
 
-import { Button, ButtonGroup } from '@ohif/ui';
+import { Button, ButtonEnums } from '@ohif/ui';
 
 function ActionButtons({ onExportClick, onCreateReportClick, disabled }) {
   const { t } = useTranslation('MeasurementTable');
@@ -10,23 +10,18 @@ function ActionButtons({ onExportClick, onCreateReportClick, disabled }) {
   return (
     <React.Fragment>
       <Button
-        className="text-base px-2 py-2"
-        size="initial"
-        variant={disabled ? 'disabled' : 'outlined'}
-        color="black"
-        border="primaryActive"
         onClick={onExportClick}
         disabled={disabled}
+        type={ButtonEnums.type.secondary}
+        size={ButtonEnums.size.small}
       >
         {t('Export')}
       </Button>
       <Button
-        className="ml-2 px-2 text-base"
-        variant={disabled ? 'disabled' : 'outlined'}
-        size="initial"
-        color="black"
-        border="primaryActive"
+        className="ml-2"
         onClick={onCreateReportClick}
+        type={ButtonEnums.type.secondary}
+        size={ButtonEnums.size.small}
         disabled={disabled}
       >
         {t('Create Report')}
diff --git a/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/index.tsx b/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/index.tsx
index 75ccba02556..9b0a8c56269 100644
--- a/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/index.tsx
+++ b/extensions/measurement-tracking/src/panels/PanelMeasurementTableTracking/index.tsx
@@ -6,6 +6,7 @@ import {
   Dialog,
   Input,
   useViewportGrid,
+  ButtonEnums,
 } from '@ohif/ui';
 import { DicomMetadataStore, utils } from '@ohif/core';
 import { useDebounce } from '@hooks';
@@ -217,9 +218,8 @@ function PanelMeasurementTableTracking({ servicesManager, extensionManager }) {
           );
         },
         actions: [
-          // temp: swap button types until colors are updated
-          { id: 'cancel', text: 'Cancel', type: 'primary' },
-          { id: 'save', text: 'Save', type: 'secondary' },
+          { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+          { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
         ],
         onSubmit: onSubmitHandler,
       },
diff --git a/extensions/measurement-tracking/src/panels/PanelStudyBrowserTracking/PanelStudyBrowserTracking.tsx b/extensions/measurement-tracking/src/panels/PanelStudyBrowserTracking/PanelStudyBrowserTracking.tsx
index 171a27bffd5..5183498b1f2 100644
--- a/extensions/measurement-tracking/src/panels/PanelStudyBrowserTracking/PanelStudyBrowserTracking.tsx
+++ b/extensions/measurement-tracking/src/panels/PanelStudyBrowserTracking/PanelStudyBrowserTracking.tsx
@@ -6,6 +6,7 @@ import {
   useImageViewer,
   useViewportGrid,
   Dialog,
+  ButtonEnums,
 } from '@ohif/ui';
 import { useTrackedMeasurements } from '../../getContextModule';
 
@@ -507,11 +508,15 @@ function _mapDisplaySets(
                   </div>
                 ),
                 actions: [
-                  { id: 'cancel', text: 'Cancel', type: 'secondary' },
+                  {
+                    id: 'cancel',
+                    text: 'Cancel',
+                    type: ButtonEnums.type.secondary,
+                  },
                   {
                     id: 'yes',
                     text: 'Yes',
-                    type: 'primary',
+                    type: ButtonEnums.type.primary,
                     classes: ['reject-yes-button'],
                   },
                 ],
diff --git a/extensions/tmtv/src/Panels/PanelPetSUV.tsx b/extensions/tmtv/src/Panels/PanelPetSUV.tsx
index 9cb5dbfd610..52f90fad1e4 100644
--- a/extensions/tmtv/src/Panels/PanelPetSUV.tsx
+++ b/extensions/tmtv/src/Panels/PanelPetSUV.tsx
@@ -225,9 +225,7 @@ export default function PanelPetSUV({ servicesManager, commandsManager }) {
               value={metadata.SeriesTime || ''}
               onChange={() => {}}
             />
-            <Button color="primary" onClick={updateMetadata}>
-              Reload Data
-            </Button>
+            <Button onClick={updateMetadata}>Reload Data</Button>
           </div>
         </div>
       }
diff --git a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ExportReports.tsx b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ExportReports.tsx
index 415b80015e4..020ccc4d4c7 100644
--- a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ExportReports.tsx
+++ b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ExportReports.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Button, ButtonGroup } from '@ohif/ui';
+import { LegacyButton, ButtonGroup } from '@ohif/ui';
 import { useTranslation } from 'react-i18next';
 
 function ExportReports({ segmentations, tmtvValue, config, commandsManager }) {
@@ -9,8 +9,9 @@ function ExportReports({ segmentations, tmtvValue, config, commandsManager }) {
     <>
       {segmentations?.length ? (
         <div className="flex justify-center mt-4 space-x-2">
+          {/* TODO Revisit design of ButtonGroup later - for now use LegacyButton for its children.*/}
           <ButtonGroup color="black" size="inherit">
-            <Button
+            <LegacyButton
               className="px-2 py-2 text-base"
               disabled={tmtvValue === null}
               onClick={() => {
@@ -22,10 +23,10 @@ function ExportReports({ segmentations, tmtvValue, config, commandsManager }) {
               }}
             >
               {t('Export CSV')}
-            </Button>
+            </LegacyButton>
           </ButtonGroup>
           <ButtonGroup color="black" size="inherit">
-            <Button
+            <LegacyButton
               className="px-2 py-2 text-base"
               onClick={() => {
                 commandsManager.runCommand('createTMTVRTReport');
@@ -33,7 +34,7 @@ function ExportReports({ segmentations, tmtvValue, config, commandsManager }) {
               disabled={tmtvValue === null}
             >
               {t('Create RT Report')}
-            </Button>
+            </LegacyButton>
           </ButtonGroup>
         </div>
       ) : null}
diff --git a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/PanelROIThresholdSegmentation.tsx b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/PanelROIThresholdSegmentation.tsx
index a18dee1c2d7..799376b72d5 100644
--- a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/PanelROIThresholdSegmentation.tsx
+++ b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/PanelROIThresholdSegmentation.tsx
@@ -181,7 +181,6 @@ export default function PanelRoiThresholdSegmentation({
         <div className="overflow-x-hidden overflow-y-auto invisible-scrollbar">
           <div className="flex mx-4 my-4 mb-4 space-x-4">
             <Button
-              color="primary"
               onClick={() => {
                 setLabelmapLoading(true);
                 setTimeout(() => {
@@ -194,9 +193,7 @@ export default function PanelRoiThresholdSegmentation({
             >
               {labelmapLoading ? 'loading ...' : 'New Label'}
             </Button>
-            <Button color="primary" onClick={handleROIThresholding}>
-              Run
-            </Button>
+            <Button onClick={handleROIThresholding}>Run</Button>
           </div>
           <div
             className="flex items-center justify-around h-8 mb-2 border-t outline-none cursor-pointer select-none bg-secondary-dark first:border-0 border-secondary-light"
diff --git a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ROIThresholdConfiguration.tsx b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ROIThresholdConfiguration.tsx
index 1a2b706f83b..3d01484cec5 100644
--- a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ROIThresholdConfiguration.tsx
+++ b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/ROIThresholdConfiguration.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Input, Label, Select, Button, ButtonGroup } from '@ohif/ui';
+import { Input, Label, Select, LegacyButton, ButtonGroup } from '@ohif/ui';
 import { useTranslation } from 'react-i18next';
 
 export const ROI_STAT = 'roi_stat';
@@ -38,8 +38,9 @@ function ROIThresholdConfiguration({ config, dispatch, runCommand }) {
           />
         </div>
         <div className="w-1/2">
+          {/* TODO Revisit design of ButtonGroup later - for now use LegacyButton for its children.*/}
           <ButtonGroup>
-            <Button
+            <LegacyButton
               size="initial"
               className="px-2 py-2 text-base text-white"
               color="primaryLight"
@@ -47,8 +48,8 @@ function ROIThresholdConfiguration({ config, dispatch, runCommand }) {
               onClick={() => runCommand('setStartSliceForROIThresholdTool')}
             >
               {t('Start')}
-            </Button>
-            <Button
+            </LegacyButton>
+            <LegacyButton
               size="initial"
               color="primaryLight"
               variant="outlined"
@@ -56,7 +57,7 @@ function ROIThresholdConfiguration({ config, dispatch, runCommand }) {
               onClick={() => runCommand('setEndSliceForROIThresholdTool')}
             >
               {t('End')}
-            </Button>
+            </LegacyButton>
           </ButtonGroup>
         </div>
       </div>
diff --git a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/segmentationEditHandler.tsx b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/segmentationEditHandler.tsx
index bfa4d01779e..50ab5cbc6d4 100644
--- a/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/segmentationEditHandler.tsx
+++ b/extensions/tmtv/src/Panels/PanelROIThresholdSegmentation/segmentationEditHandler.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { Input, Dialog } from '@ohif/ui';
+import { Input, Dialog, ButtonEnums } from '@ohif/ui';
 
 function segmentationItemEditHandler({ id, servicesManager }) {
   const { segmentationService, uiDialogService } = servicesManager.services;
@@ -44,23 +44,20 @@ function segmentationItemEditHandler({ id, servicesManager }) {
           }
         };
         return (
-          <div className="p-4 bg-primary-dark">
-            <Input
-              autoFocus
-              className="mt-2 bg-black border-primary-main"
-              type="text"
-              containerClassName="mr-2"
-              value={value.label}
-              onChange={onChangeHandler}
-              onKeyPress={onKeyPressHandler}
-            />
-          </div>
+          <Input
+            autoFocus
+            className="bg-black border-primary-main"
+            type="text"
+            containerClassName="mr-2"
+            value={value.label}
+            onChange={onChangeHandler}
+            onKeyPress={onKeyPressHandler}
+          />
         );
       },
       actions: [
-        // temp: swap button types until colors are updated
-        { id: 'cancel', text: 'Cancel', type: 'primary' },
-        { id: 'save', text: 'Save', type: 'secondary' },
+        { id: 'cancel', text: 'Cancel', type: ButtonEnums.type.secondary },
+        { id: 'save', text: 'Save', type: ButtonEnums.type.primary },
       ],
       onSubmit: onSubmitHandler,
     },
diff --git a/platform/app/cypress/integration/measurement-tracking/OHIFContextMenuCustomization.spec.js b/platform/app/cypress/integration/measurement-tracking/OHIFContextMenuCustomization.spec.js
index e87f1bb80c3..2d65781262c 100644
--- a/platform/app/cypress/integration/measurement-tracking/OHIFContextMenuCustomization.spec.js
+++ b/platform/app/cypress/integration/measurement-tracking/OHIFContextMenuCustomization.spec.js
@@ -1,5 +1,5 @@
-describe('OHIF Context Menu', function () {
-  beforeEach(function () {
+describe('OHIF Context Menu', function() {
+  beforeEach(function() {
     cy.checkStudyRouteInViewer(
       '1.2.840.113619.2.5.1762583153.215519.978957063.78'
     );
@@ -10,10 +10,10 @@ describe('OHIF Context Menu', function () {
     cy.resetViewport().wait(50);
   });
 
-  it('checks context menu customization', function () {
+  it('checks context menu customization', function() {
     // Add length measurement
     cy.addLengthMeasurement();
-    cy.get('[data-cy="prompt-begin-tracking-yes"]').click();
+    cy.get('[data-cy="prompt-begin-tracking-yes-btn"]').click();
     cy.get('[data-cy="measurement-item"]').click();
 
     const [x1, y1] = [150, 100];
diff --git a/platform/app/cypress/integration/measurement-tracking/OHIFCornerstoneToolbar.spec.js b/platform/app/cypress/integration/measurement-tracking/OHIFCornerstoneToolbar.spec.js
index c20aa75c63c..76c3fa2e4ad 100644
--- a/platform/app/cypress/integration/measurement-tracking/OHIFCornerstoneToolbar.spec.js
+++ b/platform/app/cypress/integration/measurement-tracking/OHIFCornerstoneToolbar.spec.js
@@ -113,7 +113,7 @@ describe('OHIF Cornerstone Toolbar', () => {
     cy.addLengthMeasurement();
     cy.get('[data-cy="viewport-notification"]').should('exist');
     cy.get('[data-cy="viewport-notification"]').should('be.visible');
-    cy.get('[data-cy="prompt-begin-tracking-yes"]').click();
+    cy.get('[data-cy="prompt-begin-tracking-yes-btn"]').click();
 
     //Verify the measurement exists in the table
     cy.get('@measurementsPanel').should('be.visible');
diff --git a/platform/app/cypress/integration/measurement-tracking/OHIFMeasurementPanel.spec.js b/platform/app/cypress/integration/measurement-tracking/OHIFMeasurementPanel.spec.js
index c96d777010f..f41cd748075 100644
--- a/platform/app/cypress/integration/measurement-tracking/OHIFMeasurementPanel.spec.js
+++ b/platform/app/cypress/integration/measurement-tracking/OHIFMeasurementPanel.spec.js
@@ -27,7 +27,7 @@ describe('OHIF Measurement Panel', function() {
     cy.addLengthMeasurement();
     cy.get('[data-cy="viewport-notification"]').should('exist');
     cy.get('[data-cy="viewport-notification"]').should('be.visible');
-    cy.get('[data-cy="prompt-begin-tracking-yes"]').click();
+    cy.get('[data-cy="prompt-begin-tracking-yes-btn"]').click();
     cy.get('[data-cy="measurement-item"]').click();
 
     cy.get('[data-cy="measurement-item"]')
@@ -46,7 +46,7 @@ describe('OHIF Measurement Panel', function() {
   it('checks if image would jump when clicked on a measurement item', function() {
     // Add length measurement
     cy.addLengthMeasurement();
-    cy.get('[data-cy="prompt-begin-tracking-yes"]').click();
+    cy.get('[data-cy="prompt-begin-tracking-yes-btn"]').click();
 
     cy.scrollToIndex(13);
 
diff --git a/platform/app/src/routes/WorkList/WorkList.tsx b/platform/app/src/routes/WorkList/WorkList.tsx
index 921e4798e16..5111d0d0d43 100644
--- a/platform/app/src/routes/WorkList/WorkList.tsx
+++ b/platform/app/src/routes/WorkList/WorkList.tsx
@@ -15,7 +15,7 @@ import { utils, hotkeys, ServicesManager } from '@ohif/core';
 import {
   Icon,
   StudyListExpandedRow,
-  Button,
+  LegacyButton,
   EmptyStudies,
   StudyListTable,
   StudyListPagination,
@@ -363,16 +363,17 @@ function WorkList({
                   ''}?${query.toString()}`}
                 // to={`${mode.routeName}/dicomweb?StudyInstanceUIDs=${studyInstanceUid}`}
               >
-                <Button
+                {/* TODO revisit the completely rounded style of buttons used for launching a mode from the worklist later - for now use LegacyButton*/}
+                <LegacyButton
                   rounded="full"
                   variant={isValidMode ? 'contained' : 'disabled'}
                   disabled={!isValidMode}
                   endIcon={<Icon name="launch-arrow" />} // launch-arrow | launch-info
-                  className={classnames('font-medium	', { 'ml-2': !isFirst })}
+                  className={classnames({ 'ml-2': !isFirst })}
                   onClick={() => {}}
                 >
                   {t(`Modes:${mode.displayName}`)}
-                </Button>
+                </LegacyButton>
               </Link>
             );
           })}
diff --git a/platform/app/tailwind.config.js b/platform/app/tailwind.config.js
index e224be2060a..b263999191e 100644
--- a/platform/app/tailwind.config.js
+++ b/platform/app/tailwind.config.js
@@ -74,9 +74,16 @@ module.exports = {
       },
 
       customblue: {
+        10: '#0A163F',
+        20: '#0B1F54',
+        30: '#09286e',
+        40: '#0E307F',
+        50: '#0F3A94',
+        80: '#1454D4',
         100: '#c4fdff',
         200: '#38daff',
         300: '#1D204D',
+        400: '#90A0C1',
       },
 
       customgray: {
diff --git a/platform/ui/src/components/Button/Button.tsx b/platform/ui/src/components/Button/Button.tsx
index 8e8fcf7a20f..e5da5c2c7f6 100644
--- a/platform/ui/src/components/Button/Button.tsx
+++ b/platform/ui/src/components/Button/Button.tsx
@@ -1,181 +1,89 @@
 import React, { useRef } from 'react';
 import PropTypes from 'prop-types';
 import classnames from 'classnames';
+import * as ButtonEnums from './ButtonEnums';
 
-const baseClasses =
-  'leading-none font-sans text-center justify-center items-center outline-none transition duration-300 ease-in-out focus:outline-none';
-
-const defaults = {
-  color: 'default',
-  disabled: false,
-  fullWidth: false,
-  rounded: 'medium',
-  border: 'none',
-  size: 'medium',
-  type: 'button',
-  variant: 'contained',
+const sizeClasses = {
+  [ButtonEnums.size.small]: 'h-[26px] text-[13px]',
+  [ButtonEnums.size.medium]: 'h-[32px] text-[14px]',
 };
 
-const roundedClasses = {
-  none: '',
-  small: 'rounded',
-  medium: 'rounded-md',
-  large: 'rounded-lg',
-  full: 'rounded-full',
-};
+const layoutClasses =
+  'box-content inline-flex flex-row items-center justify-center gap-[5px] justify center px-[10px] outline-none rounded';
 
-const variants = {
-  text: {
-    default:
-      'text-primary-light hover:bg-primary-light hover:text-white active:opacity-80 focus:bg-primary-light focus:text-white',
-    primary:
-      'text-primary-main hover:bg-primary-main hover:text-white active:opacity-80 focus:bg-primary-main focus:text-white',
-    secondary:
-      'text-secondary-light hover:bg-secondary-light hover:text-white active:opacity-80 focus:bg-secondary-light focus:text-white',
-    white:
-      'text-white hover:bg-white hover:text-black active:opacity-80 focus:bg-white focus:text-black',
-    black:
-      'text-black hover:bg-black hover:text-white focus:bg-black focus:text-white active:opacity-80',
-  },
-  outlined: {
-    default:
-      'text-primary-light hover:bg-primary-light hover:text-black focus:text-black focus:bg-primary-light active:opacity-80',
-    primary:
-      'text-primary-main hover:opacity-80 active:opacity-100 focus:opacity-80',
-    secondary:
-      'text-secondary-light hover:opacity-80 active:opacity-100 focus:opacity-80',
-    translucent:
-      'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
-    white:
-      'text-black hover:bg-primary-main focus:bg-primary-main hover:border-black focus:border-black',
-    black:
-      'text-white hover:bg-primary-main focus:bg-primary-main hover:border-black focus:border-black',
-    primaryActive:
-      'text-primary-active hover:opacity-80 active:opacity-100 focus:opacity-80',
-    primaryLight:
-      'border bg-transparent border-primary-main text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
-  },
-  contained: {
-    default: 'text-black hover:opacity-80 active:opacity-100 focus:opacity-80',
-    primary: 'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
-    primaryDark:
-      'text-primary-active hover:opacity-80 active:opacity-100 focus:opacity-80',
-    secondary:
-      'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
-    white: 'text-black hover:opacity-80 active:opacity-100 focus:opacity-80',
-    black: 'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
-    light:
-      'border text-black hover:opacity-80 active:opacity-100 focus:opacity-80',
-  },
-  disabled: {
-    default: 'cursor-not-allowed opacity-50 text-black',
-    primary: 'cursor-not-allowed opacity-50 text-white',
-    secondary: 'cursor-not-allowed opacity-50 text-white',
-    white: 'cursor-not-allowed opacity-50 text-black',
-    black: 'cursor-not-allowed opacity-50 text-white',
-    light: 'cursor-not-allowed opacity-50 border text-black',
-  },
-};
+const baseFontTextClasses =
+  'leading-[1.2] font-sans text-center whitespace-nowrap';
 
-const defaultVariantBackGroundColor = {
-  text: {
-    default: '',
-    primary: '',
-    secondary: '',
-    white: '',
-    black: '',
-  },
-  outlined: {
-    default: 'bg-transparent',
-    primary: 'bg-transparent',
-    secondary: 'bg-transparent',
-    black: 'bg-black',
-    white: '',
-  },
-  contained: {
-    default: 'bg-primary-light',
-    primary: 'bg-primary-main',
-    primaryDark: 'bg-primary-dark',
-    secondary: 'bg-secondary-light',
-    white: 'bg-white',
-    black: 'bg-black',
-    light: 'bg-primary-light',
-  },
-  disabled: {
-    default: 'bg-primary-light',
-    primary: 'bg-primary-main',
-    secondary: 'bg-secondary-light',
-    white: 'bg-white',
-    black: 'bg-black',
-    light: 'bg-primary-light',
-  },
+const fontTextClasses = {
+  [ButtonEnums.type.primary]: classnames(baseFontTextClasses, 'font-semibold'),
+  [ButtonEnums.type.secondary]: classnames(baseFontTextClasses, 'font-400'),
 };
 
-const _getVariantClass = (variant, color, bgColor = null) => {
-  const defaultBackgroundColor = defaultVariantBackGroundColor[variant][color];
-
-  if (!bgColor) {
-    bgColor = defaultBackgroundColor;
-  }
-
-  return `${variants[variant][color]} ${bgColor}`;
+const baseEnabledEffectClasses =
+  'transition duration-300 ease-in-out focus:outline-none';
+
+const enabledEffectClasses = {
+  [ButtonEnums.type.primary]: classnames(
+    baseEnabledEffectClasses,
+    'hover:bg-customblue-80 active:bg-customblue-40'
+  ),
+  [ButtonEnums.type.secondary]: classnames(
+    baseEnabledEffectClasses,
+    'hover:bg-customblue-50 active:bg-customblue-20'
+  ),
 };
 
-const borderClasses = {
-  none: '',
-  light: 'border border-primary-light',
-  primary: 'border border-primary-main',
-  primaryActive: 'border border-primary-active',
-  secondary: 'border border-secondary-light',
-  white: 'border border-white',
-  black: 'border border-black',
+const baseEnabledClasses = 'text-white';
+
+const enabledClasses = {
+  [ButtonEnums.type.primary]: classnames(
+    'bg-primary-main',
+    baseEnabledClasses,
+    enabledEffectClasses[ButtonEnums.type.primary]
+  ),
+  [ButtonEnums.type.secondary]: classnames(
+    'bg-customblue-30',
+    baseEnabledClasses,
+    enabledEffectClasses[ButtonEnums.type.secondary]
+  ),
 };
 
-const sizeClasses = {
-  small: 'py-2 px-2 text-sm min-w-md',
-  medium: 'py-2 px-2 text-lg min-w-md',
-  large: 'py-2 px-6 text-xl min-w-md',
-  initial: '',
-};
+const disabledClasses =
+  'bg-inputfield-placeholder text-common-light cursor-default';
 
-const fullWidthClasses = {
-  true: 'flex w-full',
-  false: 'inline-flex',
+const defaults = {
+  color: 'default',
+  disabled: false,
+  rounded: 'small',
+  size: ButtonEnums.size.medium,
+  type: ButtonEnums.type.primary,
 };
 
 const Button = ({
   children,
-  variant = defaults.variant,
-  color = defaults.color,
-  border = defaults.border,
   size = defaults.size,
-  rounded = defaults.rounded,
   disabled = defaults.disabled,
   type = defaults.type,
-  fullWidth = defaults.fullWidth,
-  bgColor = null,
   startIcon: startIconProp,
   endIcon: endIconProp,
   name,
   className,
   onClick,
-  /** TODO: All possible props should be explicitly defined -- avoid spreading props  */
-  ...rest
 }) => {
   const startIcon = startIconProp && (
-    <div className="mr-2">
+    <>
       {React.cloneElement(startIconProp, {
         className: classnames('w-4 h-4 fill-current'),
       })}
-    </div>
+    </>
   );
 
   const endIcon = endIconProp && (
-    <div className="ml-2">
+    <>
       {React.cloneElement(endIconProp, {
         className: classnames('w-4 h-4 fill-current'),
       })}
-    </div>
+    </>
   );
   const buttonElement = useRef(null);
 
@@ -187,12 +95,11 @@ const Button = ({
   };
 
   const finalClassName = classnames(
-    baseClasses,
-    _getVariantClass(variant, color, bgColor),
-    borderClasses[border],
-    roundedClasses[rounded],
+    layoutClasses,
+    fontTextClasses[type],
+    disabled ? disabledClasses : enabledClasses[type],
     sizeClasses[size],
-    fullWidthClasses[fullWidth],
+    children ? 'min-w-[32px]' : '', // minimum width for buttons with text; icon only button does NOT get a minimum width
     className
   );
 
@@ -202,9 +109,7 @@ const Button = ({
       disabled={disabled}
       ref={buttonElement}
       onClick={handleOnClick}
-      type={type}
       data-cy={`${name}-btn`}
-      {...rest}
     >
       {startIcon}
       {children}
@@ -214,10 +119,11 @@ const Button = ({
 };
 
 Button.defaultProps = {
-  color: defaults.color,
   disabled: false,
   children: '',
   onClick: () => {},
+  type: defaults.type,
+  size: defaults.size,
 };
 
 Button.propTypes = {
@@ -226,39 +132,11 @@ Button.propTypes = {
   /** Callback to be called when the button is clicked  */
   onClick: PropTypes.func.isRequired,
   /** Button size  */
-  size: PropTypes.oneOf(['small', 'medium', 'large', 'initial', 'inherit']),
-  /** Button corner roundness  */
-  rounded: PropTypes.oneOf(['none', 'small', 'medium', 'large', 'full']),
-  variant: PropTypes.oneOf(['text', 'outlined', 'contained', 'disabled']),
-  /* color prop must have all the possible keys of variants defined above */
-  color: PropTypes.oneOf([
-    'default',
-    'primary',
-    'primaryDark',
-    'primaryActive',
-    'secondary',
-    'white',
-    'black',
-    'inherit',
-    'light',
-    'translucent',
-  ]),
-  border: PropTypes.oneOf([
-    'none',
-    'light',
-    'default',
-    'primary',
-    'primaryActive',
-    'secondary',
-    'white',
-    'black',
-  ]),
-  /** Whether the button should have full width  */
-  fullWidth: PropTypes.bool,
+  size: PropTypes.oneOf([ButtonEnums.size.medium, ButtonEnums.size.small]),
   /** Whether the button should be disabled  */
   disabled: PropTypes.bool,
   /** Button type  */
-  type: PropTypes.string,
+  type: PropTypes.oneOf([ButtonEnums.type.primary, ButtonEnums.type.secondary]),
   name: PropTypes.string,
   /** Button start icon name - if any icon is specified  */
   startIcon: PropTypes.node,
@@ -266,8 +144,6 @@ Button.propTypes = {
   endIcon: PropTypes.node,
   /** Additional TailwindCSS classnames */
   className: PropTypes.string,
-  /** Background color for the button to override*/
-  bgColor: PropTypes.string,
 };
 
 export default Button;
diff --git a/platform/ui/src/components/Button/ButtonEnums.ts b/platform/ui/src/components/Button/ButtonEnums.ts
new file mode 100644
index 00000000000..2dee84b522a
--- /dev/null
+++ b/platform/ui/src/components/Button/ButtonEnums.ts
@@ -0,0 +1,10 @@
+enum type {
+  primary = 'primary',
+  secondary = 'secondary',
+}
+enum size {
+  medium = 'medium',
+  small = 'small',
+}
+
+export { type, size };
diff --git a/platform/ui/src/components/Button/__stories__/button.stories.mdx b/platform/ui/src/components/Button/__stories__/button.stories.mdx
index e01f38d6442..5e6fa623658 100644
--- a/platform/ui/src/components/Button/__stories__/button.stories.mdx
+++ b/platform/ui/src/components/Button/__stories__/button.stories.mdx
@@ -1,4 +1,4 @@
-import Button from '../Button';
+import Button, {ButtonType, ButtonSize} from '../Button';
 import { ArgsTable, Story, Canvas, Meta } from '@storybook/addon-docs';
 import {
   createComponentTemplate,
@@ -24,7 +24,7 @@ export const buttonTemplate = createComponentTemplate(Button);
 ## Overview
 
 You can use the button component to create a button. It can be used in different
-ways, the default button is a simple button with a text.
+ways, the default button is a simple button with text.
 
 <Canvas>
   <Story name="Overview" args={{ children: 'Button', color: 'default' }}>
@@ -38,37 +38,29 @@ ways, the default button is a simple button with a text.
 
 ## Usage
 
-### Variants
+### Types
 
-There can be different variants of buttons: `text`, `outlined`, `contained`, and
-`disabled`.
+There can be different types of buttons: `primary`, and `secondary`.
 
 <Canvas>
-  <Story name="Variants">
+  <Story name="Types">
     <div className="flex space-x-2">
-      <Button variant="text">Text Button</Button>
-      <Button variant="outlined">Outlined Button</Button>
-      <Button variant="contained">Contained Button</Button>
-      <Button variant="disabled">Disabled Button</Button>
+      <Button type={ButtonType.primary}>Primary Button</Button>
+      <Button type={ButtonType.secondary}>Secondary Button</Button>
     </div>
   </Story>
 </Canvas>
 
-### Colors
+### Sizes
 
-There are different colors for the button: `default`, `primary`, `secondary`,
-`white`, `black`, `inherit`, `light`.
+There are different sizes for the button: `small`, and `medium`. The size refers
+to the button's height.
 
 <Canvas>
   <Story name="Colors">
-    <div className="flex space-x-2">
-      <Button color="default">Default Button</Button>
-      <Button color="primary">Primary Button</Button>
-      <Button color="secondary">Secondary Button</Button>
-      <Button color="white">White Button</Button>
-      <Button color="black">Black Button</Button>
-      <Button color="inherit">Inherit Button</Button>
-      <Button color="light">Light Button</Button>
+    <div className="flex items-center space-x-2">
+      <Button size={ButtonSize.small}>Small Button</Button>
+      <Button size={ButtonSize.medium}>Medium Button</Button>
     </div>
   </Story>
 </Canvas>
@@ -79,19 +71,19 @@ You can mix different props together to create a button.
 
 <Canvas>
   <Story name="Custom">
-    <Button color="secondary" variant="outlined">
-      Custom Button
+    <Button type={ButtonType.secondary} size={ButtonSize.small}>
+      Small, Secondary Button
     </Button>
   </Story>
 </Canvas>
 
 ### Disabled
 
-You can disable the button by setting the variant to `disabled`.
+You can disable the button by setting the `disabled` property to true.
 
 <Canvas>
   <Story name="Disabled">
-    <Button variant="disabled">Disabled Button</Button>
+    <Button disabled={true}>Disabled Button</Button>
   </Story>
 </Canvas>
 
@@ -159,18 +151,6 @@ End Icon is the same as start icon, but for the end of the button.
   </Story>
 </Canvas>
 
-### Full width
-
-You can make the button full width by setting the `fullWidth` prop to `true`.
-
-<Canvas>
-  <Story name="Full Width">
-    <Button fullWidth color="secondary">
-      Full Width Button
-    </Button>
-  </Story>
-</Canvas>
-
 ## Contribute
 
 <Footer componentRelativePath="Button/__stories__/button.stories.mdx" />
diff --git a/platform/ui/src/components/Button/index.js b/platform/ui/src/components/Button/index.js
index 4ae846f7719..70c4390d7bd 100644
--- a/platform/ui/src/components/Button/index.js
+++ b/platform/ui/src/components/Button/index.js
@@ -1,2 +1,5 @@
 import Button from './Button';
+import * as ButtonEnums from './ButtonEnums';
+
+export { ButtonEnums };
 export default Button;
diff --git a/platform/ui/src/components/Dialog/Footer.tsx b/platform/ui/src/components/Dialog/Footer.tsx
index 7db70720dd3..c1a938024c7 100644
--- a/platform/ui/src/components/Dialog/Footer.tsx
+++ b/platform/ui/src/components/Dialog/Footer.tsx
@@ -2,7 +2,7 @@ import React from 'react';
 import classNames from 'classnames';
 import PropTypes from 'prop-types';
 
-import Button from '../Button';
+import Button, { ButtonEnums } from '../Button';
 
 const Footer = ({ actions, className, onSubmit, value }) => {
   const flex = 'flex items-center justify-end';
@@ -12,7 +12,6 @@ const Footer = ({ actions, className, onSubmit, value }) => {
     <div className={classNames(flex, padding, className)}>
       {actions.map((action, index) => {
         const isFirst = index === 0;
-        const isPrimary = action.type === 'primary';
 
         const onClickHandler = event => onSubmit({ action, value, event });
 
@@ -20,9 +19,8 @@ const Footer = ({ actions, className, onSubmit, value }) => {
           <Button
             key={index}
             className={classNames({ 'ml-2': !isFirst }, action.classes)}
-            color={isPrimary ? 'primary' : undefined}
+            type={action.type}
             onClick={onClickHandler}
-            style={{ transition: 'all .15s ease', height: 34 }}
           >
             {action.text}
           </Button>
@@ -42,7 +40,10 @@ Footer.propTypes = {
       id: PropTypes.string.isRequired,
       text: PropTypes.string.isRequired,
       value: PropTypes.any,
-      type: PropTypes.oneOf(['primary', 'secondary', 'cancel']).isRequired,
+      type: PropTypes.oneOf([
+        ButtonEnums.type.primary,
+        ButtonEnums.type.secondary,
+      ]).isRequired,
       classes: PropTypes.arrayOf(PropTypes.string),
     })
   ).isRequired,
diff --git a/platform/ui/src/components/LegacyButton/LegacyButton.tsx b/platform/ui/src/components/LegacyButton/LegacyButton.tsx
new file mode 100644
index 00000000000..ecfa67db9c9
--- /dev/null
+++ b/platform/ui/src/components/LegacyButton/LegacyButton.tsx
@@ -0,0 +1,273 @@
+import React, { useRef } from 'react';
+import PropTypes from 'prop-types';
+import classnames from 'classnames';
+
+const baseClasses =
+  'leading-none font-sans text-center justify-center items-center outline-none transition duration-300 ease-in-out focus:outline-none';
+
+const defaults = {
+  color: 'default',
+  disabled: false,
+  fullWidth: false,
+  rounded: 'medium',
+  border: 'none',
+  size: 'medium',
+  type: 'button',
+  variant: 'contained',
+};
+
+const roundedClasses = {
+  none: '',
+  small: 'rounded',
+  medium: 'rounded-md',
+  large: 'rounded-lg',
+  full: 'rounded-full',
+};
+
+const variants = {
+  text: {
+    default:
+      'text-primary-light hover:bg-primary-light hover:text-white active:opacity-80 focus:bg-primary-light focus:text-white',
+    primary:
+      'text-primary-main hover:bg-primary-main hover:text-white active:opacity-80 focus:bg-primary-main focus:text-white',
+    secondary:
+      'text-secondary-light hover:bg-secondary-light hover:text-white active:opacity-80 focus:bg-secondary-light focus:text-white',
+    white:
+      'text-white hover:bg-white hover:text-black active:opacity-80 focus:bg-white focus:text-black',
+    black:
+      'text-black hover:bg-black hover:text-white focus:bg-black focus:text-white active:opacity-80',
+  },
+  outlined: {
+    default:
+      'text-primary-light hover:bg-primary-light hover:text-black focus:text-black focus:bg-primary-light active:opacity-80',
+    primary:
+      'text-primary-main hover:opacity-80 active:opacity-100 focus:opacity-80',
+    secondary:
+      'text-secondary-light hover:opacity-80 active:opacity-100 focus:opacity-80',
+    translucent:
+      'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
+    white:
+      'text-black hover:bg-primary-main focus:bg-primary-main hover:border-black focus:border-black',
+    black:
+      'text-white hover:bg-primary-main focus:bg-primary-main hover:border-black focus:border-black',
+    primaryActive:
+      'text-primary-active hover:opacity-80 active:opacity-100 focus:opacity-80',
+    primaryLight:
+      'border bg-transparent border-primary-main text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
+  },
+  contained: {
+    default: 'text-black hover:opacity-80 active:opacity-100 focus:opacity-80',
+    primary: 'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
+    primaryDark:
+      'text-primary-active hover:opacity-80 active:opacity-100 focus:opacity-80',
+    secondary:
+      'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
+    white: 'text-black hover:opacity-80 active:opacity-100 focus:opacity-80',
+    black: 'text-white hover:opacity-80 active:opacity-100 focus:opacity-80',
+    light:
+      'border text-black hover:opacity-80 active:opacity-100 focus:opacity-80',
+  },
+  disabled: {
+    default: 'cursor-not-allowed opacity-50 text-black',
+    primary: 'cursor-not-allowed opacity-50 text-white',
+    secondary: 'cursor-not-allowed opacity-50 text-white',
+    white: 'cursor-not-allowed opacity-50 text-black',
+    black: 'cursor-not-allowed opacity-50 text-white',
+    light: 'cursor-not-allowed opacity-50 border text-black',
+  },
+};
+
+const defaultVariantBackGroundColor = {
+  text: {
+    default: '',
+    primary: '',
+    secondary: '',
+    white: '',
+    black: '',
+  },
+  outlined: {
+    default: 'bg-transparent',
+    primary: 'bg-transparent',
+    secondary: 'bg-transparent',
+    black: 'bg-black',
+    white: '',
+  },
+  contained: {
+    default: 'bg-primary-light',
+    primary: 'bg-primary-main',
+    primaryDark: 'bg-primary-dark',
+    secondary: 'bg-secondary-light',
+    white: 'bg-white',
+    black: 'bg-black',
+    light: 'bg-primary-light',
+  },
+  disabled: {
+    default: 'bg-primary-light',
+    primary: 'bg-primary-main',
+    secondary: 'bg-secondary-light',
+    white: 'bg-white',
+    black: 'bg-black',
+    light: 'bg-primary-light',
+  },
+};
+
+const _getVariantClass = (variant, color, bgColor = null) => {
+  const defaultBackgroundColor = defaultVariantBackGroundColor[variant][color];
+
+  if (!bgColor) {
+    bgColor = defaultBackgroundColor;
+  }
+
+  return `${variants[variant][color]} ${bgColor}`;
+};
+
+const borderClasses = {
+  none: '',
+  light: 'border border-primary-light',
+  primary: 'border border-primary-main',
+  primaryActive: 'border border-primary-active',
+  secondary: 'border border-secondary-light',
+  white: 'border border-white',
+  black: 'border border-black',
+};
+
+const sizeClasses = {
+  small: 'py-2 px-2 text-sm min-w-md',
+  medium: 'py-2 px-2 text-lg min-w-md',
+  large: 'py-2 px-6 text-xl min-w-md',
+  initial: '',
+};
+
+const fullWidthClasses = {
+  true: 'flex w-full',
+  false: 'inline-flex',
+};
+
+const LegacyButton = ({
+  children,
+  variant = defaults.variant,
+  color = defaults.color,
+  border = defaults.border,
+  size = defaults.size,
+  rounded = defaults.rounded,
+  disabled = defaults.disabled,
+  type = defaults.type,
+  fullWidth = defaults.fullWidth,
+  bgColor = null,
+  startIcon: startIconProp,
+  endIcon: endIconProp,
+  name,
+  className,
+  onClick,
+  /** TODO: All possible props should be explicitly defined -- avoid spreading props  */
+  ...rest
+}) => {
+  const startIcon = startIconProp && (
+    <div className="mr-2">
+      {React.cloneElement(startIconProp, {
+        className: classnames('w-4 h-4 fill-current'),
+      })}
+    </div>
+  );
+
+  const endIcon = endIconProp && (
+    <div className="ml-2">
+      {React.cloneElement(endIconProp, {
+        className: classnames('w-4 h-4 fill-current'),
+      })}
+    </div>
+  );
+  const buttonElement = useRef(null);
+
+  const handleOnClick = e => {
+    buttonElement.current.blur();
+    if (!disabled) {
+      onClick(e);
+    }
+  };
+
+  const finalClassName = classnames(
+    baseClasses,
+    _getVariantClass(variant, color, bgColor),
+    borderClasses[border],
+    roundedClasses[rounded],
+    sizeClasses[size],
+    fullWidthClasses[fullWidth],
+    className
+  );
+
+  return (
+    <button
+      className={finalClassName}
+      disabled={disabled}
+      ref={buttonElement}
+      onClick={handleOnClick}
+      type={type}
+      data-cy={`${name}-btn`}
+      {...rest}
+    >
+      {startIcon}
+      {children}
+      {endIcon}
+    </button>
+  );
+};
+
+LegacyButton.defaultProps = {
+  color: defaults.color,
+  disabled: false,
+  children: '',
+  onClick: () => {},
+};
+
+LegacyButton.propTypes = {
+  /** What is inside the button, can be text or react component */
+  children: PropTypes.node,
+  /** Callback to be called when the button is clicked  */
+  onClick: PropTypes.func.isRequired,
+  /** Button size  */
+  size: PropTypes.oneOf(['small', 'medium', 'large', 'initial', 'inherit']),
+  /** Button corner roundness  */
+  rounded: PropTypes.oneOf(['none', 'small', 'medium', 'large', 'full']),
+  variant: PropTypes.oneOf(['text', 'outlined', 'contained', 'disabled']),
+  /* color prop must have all the possible keys of variants defined above */
+  color: PropTypes.oneOf([
+    'default',
+    'primary',
+    'primaryDark',
+    'primaryActive',
+    'secondary',
+    'white',
+    'black',
+    'inherit',
+    'light',
+    'translucent',
+  ]),
+  border: PropTypes.oneOf([
+    'none',
+    'light',
+    'default',
+    'primary',
+    'primaryActive',
+    'secondary',
+    'white',
+    'black',
+  ]),
+  /** Whether the button should have full width  */
+  fullWidth: PropTypes.bool,
+  /** Whether the button should be disabled  */
+  disabled: PropTypes.bool,
+  /** Button type  */
+  type: PropTypes.string,
+  name: PropTypes.string,
+  /** Button start icon name - if any icon is specified  */
+  startIcon: PropTypes.node,
+  /** Button end icon name - if any icon is specified  */
+  endIcon: PropTypes.node,
+  /** Additional TailwindCSS classnames */
+  className: PropTypes.string,
+  /** Background color for the button to override*/
+  bgColor: PropTypes.string,
+};
+
+export default LegacyButton;
diff --git a/platform/ui/src/components/LegacyButton/__stories__/legacyButton.stories.mdx b/platform/ui/src/components/LegacyButton/__stories__/legacyButton.stories.mdx
new file mode 100644
index 00000000000..7a4de0d62a6
--- /dev/null
+++ b/platform/ui/src/components/LegacyButton/__stories__/legacyButton.stories.mdx
@@ -0,0 +1,176 @@
+import LegacyButton from '../LegacyButton';
+import { ArgsTable, Story, Canvas, Meta } from '@storybook/addon-docs';
+import {
+  createComponentTemplate,
+  createStoryMetaSettings,
+} from '../../../storybook/functions/create-component-story';
+
+export const argTypes = {
+  component: LegacyButton,
+  title: 'Components/LegacyButton',
+};
+
+<Meta title="Components/LegacyButton" component={LegacyButton} />
+
+export const buttonTemplate = createComponentTemplate(LegacyButton);
+
+<Heading title="LegacyButton" componentRelativePath="LegacyButton/LegacyButton.tsx" />
+
+- [Overview](#overview)
+- [Props](#props)
+- [Usage](#usage)
+- [Contribute](#contribute)
+
+## Overview
+
+You can use the legacy button component to create a button. It can be used in different
+ways, the default button is a simple button with a text.
+
+<Canvas>
+  <Story name="Overview" args={{ children: 'LegacyButton', color: 'default' }}>
+    {buttonTemplate.bind({})}
+  </Story>
+</Canvas>
+
+## Props
+
+<ArgsTable of={LegacyButton} />
+
+## Usage
+
+### Variants
+
+There can be different variants of buttons: `text`, `outlined`, `contained`, and
+`disabled`.
+
+<Canvas>
+  <Story name="Variants">
+    <div className="flex space-x-2">
+      <LegacyButton variant="text">Text LegacyButton</LegacyButton>
+      <LegacyButton variant="outlined">Outlined LegacyButton</LegacyButton>
+      <LegacyButton variant="contained">Contained LegacyButton</LegacyButton>
+      <LegacyButton variant="disabled">Disabled LegacyButton</LegacyButton>
+    </div>
+  </Story>
+</Canvas>
+
+### Colors
+
+There are different colors for the legacy button: `default`, `primary`, `secondary`,
+`white`, `black`, `inherit`, `light`.
+
+<Canvas>
+  <Story name="Colors">
+    <div className="flex space-x-2">
+      <LegacyButton color="default">Default LegacyButton</LegacyButton>
+      <LegacyButton color="primary">Primary LegacyButton</LegacyButton>
+      <LegacyButton color="secondary">Secondary LegacyButton</LegacyButton>
+      <LegacyButton color="white">White LegacyButton</LegacyButton>
+      <LegacyButton color="black">Black LegacyButton</LegacyButton>
+      <LegacyButton color="inherit">Inherit LegacyButton</LegacyButton>
+      <LegacyButton color="light">Light LegacyButton</LegacyButton>
+    </div>
+  </Story>
+</Canvas>
+
+### Mixing props
+
+You can mix different props together to create a legacy button.
+
+<Canvas>
+  <Story name="Custom">
+    <LegacyButton color="secondary" variant="outlined">
+      Custom LegacyButton
+    </LegacyButton>
+  </Story>
+</Canvas>
+
+### Disabled
+
+You can disable the legacy button by setting the variant to `disabled`.
+
+<Canvas>
+  <Story name="Disabled">
+    <LegacyButton variant="disabled">Disabled LegacyButton</LegacyButton>
+  </Story>
+</Canvas>
+
+### Start/End Icons
+
+You can add an icon to the start of the legacy button. It accepts an icon component.
+
+<Canvas>
+  <Story name="Start Icon">
+    {() => {
+      // svg icon for github
+      const Github = () => {
+        return (
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            width="24"
+            height="24"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            strokeWidth="2"
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            className="feather feather-github"
+          >
+            <path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37 0 0 0-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44 0 0 0 20 4.77 5.07 5.07 0 0 0 19.91 1S18.73.65 16 2.48a13.38 13.38 0 0 0-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07 0 0 0 5 4.77a5.44 5.44 0 0 0-1.5 3.78c0 5.42 3.3 6.61 6.44 7A3.37 3.37 0 0 0 9 18.13V22"></path>
+          </svg>
+        );
+      };
+      return <LegacyButton startIcon={<Github />}>Start Icon LegacyButton</LegacyButton>;
+    }}
+  </Story>
+</Canvas>
+
+End Icon is the same as start icon, but for the end of the legacy button.
+
+<Canvas>
+  <Story name="End Icon">
+    {() => {
+      // svg icon for github
+      const Github = () => {
+        return (
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            width="24"
+            height="24"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            strokeWidth="2"
+            strokeLinecap="round"
+            strokeLinejoin="round"
+            className="feather feather-github"
+          >
+            <path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37 0 0 0-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44 0 0 0 20 4.77 5.07 5.07 0 0 0 19.91 1S18.73.65 16 2.48a13.38 13.38 0 0 0-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07 0 0 0 5 4.77a5.44 5.44 0 0 0-1.5 3.78c0 5.42 3.3 6.61 6.44 7A3.37 3.37 0 0 0 9 18.13V22"></path>
+          </svg>
+        );
+      };
+      return (
+        <LegacyButton startIcon={<Github />} endIcon={<Github />}>
+          Start and End Icon LegacyButton
+        </LegacyButton>
+      );
+    }}
+  </Story>
+</Canvas>
+
+### Full width
+
+You can make the legacy button full width by setting the `fullWidth` prop to `true`.
+
+<Canvas>
+  <Story name="Full Width">
+    <LegacyButton fullWidth color="secondary">
+      Full Width LegacyButton
+    </LegacyButton>
+  </Story>
+</Canvas>
+
+## Contribute
+
+<Footer componentRelativePath="LegacyButton/__stories__/legacyButton.stories.mdx" />
diff --git a/platform/ui/src/components/LegacyButton/index.js b/platform/ui/src/components/LegacyButton/index.js
new file mode 100644
index 00000000000..116b6aa43c7
--- /dev/null
+++ b/platform/ui/src/components/LegacyButton/index.js
@@ -0,0 +1,2 @@
+import LegacyButton from './LegacyButton';
+export default LegacyButton;
diff --git a/platform/ui/src/components/LegacyViewportActionBar/LegacyViewportActionBar.tsx b/platform/ui/src/components/LegacyViewportActionBar/LegacyViewportActionBar.tsx
index 71ec24f3722..2765ee2fa91 100644
--- a/platform/ui/src/components/LegacyViewportActionBar/LegacyViewportActionBar.tsx
+++ b/platform/ui/src/components/LegacyViewportActionBar/LegacyViewportActionBar.tsx
@@ -6,7 +6,7 @@ import { StringNumber } from '../../types';
 import LegacyPatientInfo from '../LegacyPatientInfo';
 import Icon from '../Icon';
 import ButtonGroup from '../ButtonGroup';
-import Button from '../Button';
+import LegacyButton from '../LegacyButton';
 import LegacyCinePlayer from '../LegacyCinePlayer';
 
 const LegacyViewportActionBar = ({
@@ -104,23 +104,24 @@ const LegacyViewportActionBar = ({
       </div>
       {showNavArrows && !showCine && (
         <div className="mt-2" style={{ pointerEvents: 'all' }}>
+          {/* TODO Revisit design of ButtonGroup later - for now use LegacyButton for its children.*/}
           <ButtonGroup>
-            <Button
+            <LegacyButton
               size="initial"
               className="px-2 py-1 bg-black"
               border="light"
               onClick={() => onArrowsClick('left')}
             >
               <Icon name="chevron-left" className="w-4 text-white" />
-            </Button>
-            <Button
+            </LegacyButton>
+            <LegacyButton
               size="initial"
               border="light"
               className="px-2 py-1 bg-black"
               onClick={() => onArrowsClick('right')}
             >
               <Icon name="chevron-right" className="w-4 text-white" />
-            </Button>
+            </LegacyButton>
           </ButtonGroup>
         </div>
       )}
diff --git a/platform/ui/src/components/Notification/Notification.tsx b/platform/ui/src/components/Notification/Notification.tsx
index d354bbbf44a..cd9cdef6ad7 100644
--- a/platform/ui/src/components/Notification/Notification.tsx
+++ b/platform/ui/src/components/Notification/Notification.tsx
@@ -2,7 +2,7 @@ import React, { useEffect, useRef } from 'react';
 import classnames from 'classnames';
 import PropTypes from 'prop-types';
 
-import Button from '../Button';
+import Button, { ButtonEnums } from '../Button';
 import Icon from '../Icon';
 
 const Notification = ({
@@ -42,7 +42,7 @@ const Notification = ({
       color: 'text-yellow-500',
     },
     info: {
-      icon: 'info',
+      icon: 'notifications-info',
       color: 'text-primary-main',
     },
     success: {
@@ -65,24 +65,23 @@ const Notification = ({
   return (
     <div
       ref={notificationRef}
-      className="flex flex-col p-2 mx-2 mt-2 rounded bg-common-bright"
+      className="flex flex-col p-2 mx-2 mt-2 border-2 rounded-md border-customblue-10 bg-customblue-400"
       data-cy={id}
     >
-      <div className="flex grow">
-        <Icon name={icon} className={classnames('w-5', color)} />
-        <span className="ml-2 text-base text-black">{message}</span>
+      <div className="flex items-center grow">
+        <Icon name={icon} className={classnames('w-6 h-6', color)} />
+        <span className="ml-2 text-[13px] text-black">{message}</span>
       </div>
-      <div className="flex justify-end mt-2">
+      <div className="flex flex-wrap gap-2 justify-end mt-2">
         {actions.map((action, index) => {
           const isFirst = index === 0;
-          const isPrimary = action.type === 'primary';
 
           return (
             <Button
-              data-cy={action.id}
+              name={action.id}
               key={index}
-              className={classnames({ 'ml-2': !isFirst })}
-              color={isPrimary ? 'primary' : undefined}
+              type={action.type}
+              size={action.size || ButtonEnums.size.small}
               onClick={() => {
                 onSubmit(action.value);
               }}
@@ -108,7 +107,11 @@ Notification.propTypes = {
     PropTypes.shape({
       text: PropTypes.string.isRequired,
       value: PropTypes.any.isRequired,
-      type: PropTypes.oneOf(['primary', 'secondary', 'cancel']).isRequired,
+      type: PropTypes.oneOf([
+        ButtonEnums.type.primary,
+        ButtonEnums.type.secondary,
+      ]).isRequired,
+      size: PropTypes.oneOf([ButtonEnums.size.small, ButtonEnums.size.medium]),
     })
   ).isRequired,
   onSubmit: PropTypes.func.isRequired,
diff --git a/platform/ui/src/components/SidePanel/SidePanel.tsx b/platform/ui/src/components/SidePanel/SidePanel.tsx
index 4be0db23526..24a6714997b 100644
--- a/platform/ui/src/components/SidePanel/SidePanel.tsx
+++ b/platform/ui/src/components/SidePanel/SidePanel.tsx
@@ -13,7 +13,7 @@ import { Swiper, SwiperSlide } from 'swiper/react';
 
 import { PanelService, ServicesManager, Types } from '@ohif/core';
 
-import Button from '../Button';
+import LegacyButton from '../LegacyButton';
 import Icon from '../Icon';
 import IconButton from '../IconButton';
 import Tooltip from '../Tooltip';
@@ -234,7 +234,8 @@ const SidePanel = ({
             }}
             data-cy={`side-panel-header-${side}`}
           >
-            <Button
+            {/* TODO This should be redesigned to not be a button. */}
+            <LegacyButton
               variant="text"
               color="inherit"
               border="none"
@@ -254,7 +255,7 @@ const SidePanel = ({
               <span className="text-primary-active">
                 {tabs.length === 1 && (t(tabs[activeTabIndex].label) as string)}
               </span>
-            </Button>
+            </LegacyButton>
           </div>
           {tabs.length > 1 &&
             _getMoreThanOneTabLayout(
diff --git a/platform/ui/src/components/StudyBrowser/StudyBrowser.tsx b/platform/ui/src/components/StudyBrowser/StudyBrowser.tsx
index bb294b5788f..45c12312de0 100644
--- a/platform/ui/src/components/StudyBrowser/StudyBrowser.tsx
+++ b/platform/ui/src/components/StudyBrowser/StudyBrowser.tsx
@@ -4,7 +4,7 @@ import { useTranslation } from 'react-i18next';
 
 import StudyItem from '../StudyItem';
 import ButtonGroup from '../ButtonGroup';
-import Button from '../Button';
+import LegacyButton from '../LegacyButton';
 import ThumbnailList from '../ThumbnailList';
 import { StringNumber } from '../../types';
 
@@ -81,6 +81,7 @@ const StudyBrowser = ({
         className="flex flex-row items-center justify-center h-16 p-4 border-b w-100 border-secondary-light bg-primary-dark"
         data-cy={'studyBrowser-panel'}
       >
+        {/* TODO Revisit design of ButtonGroup later - for now use LegacyButton for its children.*/}
         <ButtonGroup variant="outlined" color="secondary" splitBorder={false}>
           {tabs.map(tab => {
             const { name, label, studies } = tab;
@@ -95,7 +96,7 @@ const StudyBrowser = ({
             };
             const color = classStudyBrowser[`${isActive}`];
             return (
-              <Button
+              <LegacyButton
                 key={name}
                 className={'text-white text-base p-2 min-w-18'}
                 size="initial"
@@ -107,7 +108,7 @@ const StudyBrowser = ({
                 disabled={isDisabled}
               >
                 {t(label)}
-              </Button>
+              </LegacyButton>
             );
           })}
         </ButtonGroup>
diff --git a/platform/ui/src/components/StudyListFilter/StudyListFilter.tsx b/platform/ui/src/components/StudyListFilter/StudyListFilter.tsx
index 6c8f0470c37..b794fefd2fc 100644
--- a/platform/ui/src/components/StudyListFilter/StudyListFilter.tsx
+++ b/platform/ui/src/components/StudyListFilter/StudyListFilter.tsx
@@ -2,7 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
 
-import Button from '../Button';
+import LegacyButton from '../LegacyButton';
 import Icon from '../Icon';
 import Typography from '../Typography';
 import InputGroup from '../InputGroup';
@@ -48,8 +48,9 @@ const StudyListFilter = ({
                 )}
               </div>
               <div className="flex flex-row">
+                {/* TODO revisit the completely rounded style of button used for clearing the study list filter - for now use LegacyButton*/}
                 {isFiltering && (
-                  <Button
+                  <LegacyButton
                     rounded="full"
                     variant="outlined"
                     color="primaryActive"
@@ -59,7 +60,7 @@ const StudyListFilter = ({
                     onClick={clearFilters}
                   >
                     {t('ClearFilters')}
-                  </Button>
+                  </LegacyButton>
                 )}
                 <Typography
                   variant="h4"
diff --git a/platform/ui/src/components/StudyListPagination/StudyListPagination.tsx b/platform/ui/src/components/StudyListPagination/StudyListPagination.tsx
index 811a8cde439..0154e558f3e 100644
--- a/platform/ui/src/components/StudyListPagination/StudyListPagination.tsx
+++ b/platform/ui/src/components/StudyListPagination/StudyListPagination.tsx
@@ -2,7 +2,7 @@ import React, { useState } from 'react';
 import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
 
-import Button from '../Button';
+import LegacyButton from '../LegacyButton';
 import ButtonGroup from '../ButtonGroup';
 import Typography from '../Typography';
 import Select from '../Select';
@@ -59,8 +59,9 @@ const StudyListPagination = ({
               <Typography className="opacity-60 mr-4 text-base">
                 {t('Page')} {currentPage}
               </Typography>
+              {/* TODO Revisit design of ButtonGroup later - for now use LegacyButton for its children.*/}
               <ButtonGroup>
-                <Button
+                <LegacyButton
                   size="initial"
                   className="px-4 py-2 text-base"
                   color="translucent"
@@ -69,8 +70,8 @@ const StudyListPagination = ({
                   onClick={() => navigateToPage(1)}
                 >
                   {`<<`}
-                </Button>
-                <Button
+                </LegacyButton>
+                <LegacyButton
                   size="initial"
                   className="py-2 px-2 text-base"
                   color="translucent"
@@ -79,8 +80,8 @@ const StudyListPagination = ({
                   onClick={() => navigateToPage(currentPage - 1)}
                 >
                   {t('Previous')}
-                </Button>
-                <Button
+                </LegacyButton>
+                <LegacyButton
                   size="initial"
                   className="py-2 px-4 text-base"
                   color="translucent"
@@ -89,7 +90,7 @@ const StudyListPagination = ({
                   onClick={() => navigateToPage(currentPage + 1)}
                 >
                   {t('Next')}
-                </Button>
+                </LegacyButton>
               </ButtonGroup>
             </div>
           </div>
diff --git a/platform/ui/src/components/UserPreferences/UserPreferences.tsx b/platform/ui/src/components/UserPreferences/UserPreferences.tsx
index 85be530c656..0a44c2a6e15 100644
--- a/platform/ui/src/components/UserPreferences/UserPreferences.tsx
+++ b/platform/ui/src/components/UserPreferences/UserPreferences.tsx
@@ -6,6 +6,7 @@ import Select from '../Select';
 import Typography from '../Typography';
 import Button from '../Button';
 import HotkeysPreferences from '../HotkeysPreferences';
+import { ButtonEnums } from '../Button';
 
 const UserPreferences = ({
   availableLanguages,
@@ -104,22 +105,18 @@ const UserPreferences = ({
       </Section>
       <div className="flex flex-row justify-between">
         <Button
-          variant="outlined"
-          border="light"
+          type={ButtonEnums.type.secondary}
           onClick={onResetHandler}
           disabled={disabled}
         >
           {t('Reset to Defaults')}
         </Button>
         <div className="flex flex-row">
-          <Button variant="outlined" border="light" onClick={onCancelHandler}>
+          <Button type={ButtonEnums.type.secondary} onClick={onCancelHandler}>
             {t('Cancel')}
           </Button>
           <Button
-            variant="contained"
             disabled={state.isDisabled}
-            color="light"
-            border="light"
             className="ml-2"
             onClick={onSubmitHandler}
           >
diff --git a/platform/ui/src/components/ViewportDownloadForm/ViewportDownloadForm.tsx b/platform/ui/src/components/ViewportDownloadForm/ViewportDownloadForm.tsx
index 99eee77aa27..60c2cf0a97d 100644
--- a/platform/ui/src/components/ViewportDownloadForm/ViewportDownloadForm.tsx
+++ b/platform/ui/src/components/ViewportDownloadForm/ViewportDownloadForm.tsx
@@ -14,7 +14,7 @@ import IconButton from '../IconButton';
 import Icon from '../Icon';
 import Select from '../Select';
 import InputLabelWrapper from '../InputLabelWrapper';
-import Button from '../Button';
+import Button, { ButtonEnums } from '../Button';
 
 const FILE_TYPE_OPTIONS = [
   {
@@ -401,13 +401,9 @@ const ViewportDownloadForm = ({
 
       <div className="flex justify-end mt-4">
         <Button
-          data-cy="cancel-btn"
-          variant="outlined"
-          size="initial"
-          color="black"
-          border="secondary"
+          name="cancel"
+          type={ButtonEnums.type.secondary}
           onClick={onClose}
-          className="p-2"
         >
           {t('Cancel')}
         </Button>
@@ -415,8 +411,8 @@ const ViewportDownloadForm = ({
           className="ml-2"
           disabled={hasError}
           onClick={downloadImage}
-          color="primary"
-          data-cy="download-btn"
+          type={ButtonEnums.type.primary}
+          name={'download'}
         >
           {t('Download')}
         </Button>
diff --git a/platform/ui/src/components/index.js b/platform/ui/src/components/index.js
index 4ca26c7e2dc..ac6fe6a4125 100644
--- a/platform/ui/src/components/index.js
+++ b/platform/ui/src/components/index.js
@@ -1,6 +1,7 @@
 import AboutModal from './AboutModal';
 import Button from './Button';
 import ButtonGroup from './ButtonGroup';
+import { ButtonEnums } from './Button';
 import ContextMenu from './ContextMenu';
 import CinePlayer from './CinePlayer';
 import DateRange from './DateRange';
@@ -18,6 +19,7 @@ import InputMultiSelect from './InputMultiSelect';
 import InputText from './InputText';
 import Label from './Label';
 import LayoutSelector from './LayoutSelector';
+import LegacyButton from './LegacyButton';
 import LegacyCinePlayer from './LegacyCinePlayer';
 import LegacyViewportActionBar from './LegacyViewportActionBar';
 import MeasurementTable from './MeasurementTable';
@@ -80,6 +82,7 @@ export {
   HotkeysPreferences,
   Button,
   ButtonGroup,
+  ButtonEnums,
   CheckBox,
   CinePlayer,
   ContextMenu,
@@ -103,6 +106,7 @@ export {
   ImageScrollbar,
   Label,
   LayoutSelector,
+  LegacyButton,
   LegacyCinePlayer,
   LegacyViewportActionBar,
   LoadingIndicatorProgress,
diff --git a/platform/ui/src/index.js b/platform/ui/src/index.js
index 7b51fd7852e..622657c1308 100644
--- a/platform/ui/src/index.js
+++ b/platform/ui/src/index.js
@@ -42,6 +42,7 @@ export {
   HotkeysPreferences,
   Button,
   ButtonGroup,
+  ButtonEnums,
   ContextMenu,
   CinePlayer,
   DateRange,
@@ -62,6 +63,7 @@ export {
   InputText,
   Label,
   LayoutSelector,
+  LegacyButton,
   LegacyCinePlayer,
   LegacyViewportActionBar,
   LoadingIndicatorProgress,
diff --git a/platform/ui/tailwind.config.js b/platform/ui/tailwind.config.js
index 4d11d86b855..c3e50e1217c 100644
--- a/platform/ui/tailwind.config.js
+++ b/platform/ui/tailwind.config.js
@@ -63,9 +63,16 @@ module.exports = {
       },
 
       customblue: {
+        10: '#0A163F',
+        20: '#0B1F54',
+        30: '#09286e',
+        40: '#0E307F',
+        50: '#0F3A94',
+        80: '#1454D4',
         100: '#c4fdff',
         200: '#38daff',
         300: '#1D204D',
+        400: '#90A0C1',
       },
 
       customgray: {