relative color syntax

.github/ISSUE_TEMPLATE/css-issue.yml

@@ -103,6 +103,7 @@ body:
         - PostCSS Progressive Custom Properties
         - PostCSS Pseudo Class Any Link
         - PostCSS Rebeccapurple
+        - PostCSS Relative Color Syntax
         - PostCSS Replace Overflow Wrap
         - PostCSS Scope Pseudo Class
         - PostCSS Selector Not

.github/ISSUE_TEMPLATE/plugin-issue.yml

@@ -105,6 +105,7 @@ body:
         - PostCSS Progressive Custom Properties
         - PostCSS Pseudo Class Any Link
         - PostCSS Rebeccapurple
+        - PostCSS Relative Color Syntax
         - PostCSS Replace Overflow Wrap
         - PostCSS Scope Pseudo Class
         - PostCSS Selector Not

.github/labeler.yml

@@ -215,14 +215,18 @@
   - plugins/postcss-pseudo-class-any-link/**
   - experimental/postcss-pseudo-class-any-link/**
 
-"plugins/postcss-scope-pseudo-class":
-  - plugins/postcss-scope-pseudo-class/**
-  - experimental/postcss-scope-pseudo-class/**
+"plugins/postcss-relative-color-syntax":
+  - plugins/postcss-relative-color-syntax/**
+  - experimental/postcss-relative-color-syntax/**
 
 "plugins/postcss-replace-overflow-wrap":
   - plugins/postcss-replace-overflow-wrap/**
   - experimental/postcss-replace-overflow-wrap/**
 
+"plugins/postcss-scope-pseudo-class":
+  - plugins/postcss-scope-pseudo-class/**
+  - experimental/postcss-scope-pseudo-class/**
+
 "plugins/postcss-selector-not":
   - plugins/postcss-selector-not/**
   - experimental/postcss-selector-not/**

packages/color-helpers/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changes to Color Helpers
 
+### Unreleased (minor)
+
+- Fix gamut mapping
+- Fix `XYZ_D50_to_ProPhoto`
+- Export `sRGB_to_HWB`
+
 ### 2.0.0 (March 25, 2023)
 
 - Removed certain implementation specific helpers. Keeping this package more focussed on general purpose color transformations.

packages/color-helpers/dist/conversions/index.d.ts

@@ -27,6 +27,7 @@ export * from './oklab-to-oklch';
 export * from './oklab-to-xyz';
 export * from './oklch-to-oklab';
 export * from './srgb-to-hsl';
+export * from './srgb-to-hwb';
 export * from './srgb-to-luminance';
 export * from './xyz-to-lab';
 export * from './xyz-to-lin-2020';

packages/color-helpers/dist/conversions/srgb-to-hwb.d.ts

@@ -0,0 +1,11 @@
+import type { Color } from 'types/color';
+/**
+ * Convert an array of gamma-corrected sRGB values in the 0.0 to 1.0 range to HWB.
+ *
+ * @param {Color} RGB [r, g, b]
+ * - Red component 0..1
+ * - Green component 0..1
+ * - Blue component 0..1
+ * @return {number[]} Array of HWB values
+ */
+export declare function sRGB_to_HWB(RGB: Color): Color;