diff --git a/packages/styles/scss/components/notification/_inline-notification.scss b/packages/styles/scss/components/notification/_inline-notification.scss
index c15a9f3c3464..62bd4c20b149 100644
--- a/packages/styles/scss/components/notification/_inline-notification.scss
+++ b/packages/styles/scss/components/notification/_inline-notification.scss
@@ -324,5 +324,8 @@
   .#{$prefix}--inline-notification__icon {
     @include high-contrast-mode('icon-fill');
   }
+  .#{$prefix}--inline-notification__close-icon {
+    @include high-contrast-mode('icon-fill');
+  }
   /* stylelint-enable */
 }
diff --git a/packages/styles/scss/components/notification/_toast-notification.scss b/packages/styles/scss/components/notification/_toast-notification.scss
index 8cbeda15645b..bd872e2d5576 100644
--- a/packages/styles/scss/components/notification/_toast-notification.scss
+++ b/packages/styles/scss/components/notification/_toast-notification.scss
@@ -255,6 +255,9 @@
   .#{$prefix}--toast-notification__close-button:focus {
     @include high-contrast-mode('focus');
   }
+  .#{$prefix}--toast-notification__close-icon {
+    @include high-contrast-mode('icon-fill');
+  }
   .#{$prefix}--toast-notification__icon {
     @include high-contrast-mode('icon-fill');
   }