Add forced-colors variant (#11694)

* Add forced-colors variant

Also add a contrast-custom variant to match custom contrast preferences

* use `toMatchSnapshot` instead of `toMatchFormattedCss`

More info: https://github.com/tailwindlabs/tailwindcss/pull/12170

* remove `contrast-custom` variant

* move `forcedColorsVariants` next to `prefersContrastVariants`

* update changelog

---------

Co-authored-by: Robin Malfait <malfait.robin@gmail.com>

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add utilities for CSS subgrid ([#12298](https://github.com/tailwindlabs/tailwindcss/pull/12298))
 - Add spacing scale to `min-w-*`, `min-h-*`, and `max-w-*` utilities ([#12300](https://github.com/tailwindlabs/tailwindcss/pull/12300))
 - Add `forced-color-adjust` utilities ([#11931](https://github.com/tailwindlabs/tailwindcss/pull/11931))
+- Add `forced-colors` variant ([#11694](https://github.com/tailwindlabs/tailwindcss/pull/11694))
 
 ## [3.3.7] - 2023-12-18
 

src/corePlugins.js

@@ -461,6 +461,10 @@ export let variantPlugins = {
     addVariant('contrast-more', '@media (prefers-contrast: more)')
     addVariant('contrast-less', '@media (prefers-contrast: less)')
   },
+
+  forcedColorsVariants: ({ addVariant }) => {
+    addVariant('forced-colors', '@media (forced-colors: active)')
+  },
 }
 
 let cssTransformValue = [

src/lib/setupContextUtils.js

@@ -767,6 +767,7 @@ function resolvePlugins(context, root) {
     variantPlugins['directionVariants'],
     variantPlugins['reducedMotionVariants'],
     variantPlugins['prefersContrastVariants'],
+    variantPlugins['forcedColorsVariants'],
     variantPlugins['darkVariants'],
     variantPlugins['printVariant'],
     variantPlugins['screenVariants'],