chore: export colors module so that DV can use it

[janhenrikoverland]

• Export colors module

[jenniferarnesen]

I think we should try to migrate to the theme being exported from ui-core instead of trying to maintain our own colors.

https://github.com/dhis2/ui-core/blob/master/src/theme.js

[edoardo]

@cooper-joe provided the following color codes mapping between the colors file and ui-core theme
colors:

const accentPrimaryDark = '#004BA0' -> primary800
const accentPrimary = '#1976D2' -> primary600
const accentPrimaryLight = '#63A4FF' -> primary300
const accentPrimaryLightest = '#EAF4FF' -> primary050

const accentSecondaryDark = '#004C40' -> secondary800
const accentSecondary = '#00796B' -> secondary600
const accentSecondaryLight = '#48A999' -> secondary300
const accentSecondaryLightest = '#B2DFDB' -> secondary200
const accentSecondaryTransparent = '#D9ECEB' -> secondary100

const black = '#000000' -> grey900
const greyDark = '#494949' -> grey700
const grey = '#9E9E9E' -> grey500
const greyLight = '#E0E0E0' -> grey300
const blueGrey = '#ECEFF1' -> grey200
const lightBlue = '#BBDEFB' -> blue200
const snow = '#F4F6F8' -> grey050
const white = '#FFFFFF' -> white

const negative = '#E53935' -> red500
const warning = '#F19C02' -> yellow500
const positive = '#3D9305' -> green500
const info = '#EAF4FF' -> grey300

// TODO remove these?
const paleGrey = '#FAFAFA' -> grey100
const lightGrey = '#F5F5F5' -> grey100
const charcoalGrey = '#CCCCCC' -> grey400
const blue = '#004BA0' -> blue800

[edoardo]

Closing.
colors from ui-core are used directly in the apps instead.