Add relative-color.dist.yml (#998)

Matches https://caniuse.com/css-relative-colors.

Author: foolip

feature-group-definitions/relative-color.dist.yml

@@ -0,0 +1,34 @@
+# Generated from: relative-color.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+name: Relative colors
+description: "The `from` keyword for color functions (`color()`, `hsl()`, `oklch()`, etc.) creates a new color based on a given color by modifying the values of the input color. Also known as relative color syntax (RCS)."
+spec: https://drafts.csswg.org/css-color-5/#relative-colors
+caniuse: css-relative-colors
+usage_stats: https://chromestatus.com/metrics/feature/timeline/popularity/4632
+status:
+  baseline: false
+  support:
+    chrome: "119"
+    chrome_android: "119"
+    edge: "119"
+    safari: "16.4"
+    safari_ios: "16.4"
+# TODO: Revisit when this has shipped in Firefox if we should retroactively
+# claim partial support in Chrome and Safari for some versions. If so, also make
+# the same changes in caniuse.
+compat_features:
+  # These are the only two features that don't use partial implementation for
+  # some browser, so they can represent initial support for the feature.
+  - css.types.color.lab.relative_syntax
+  - css.types.color.oklab.relative_syntax
+  # Partial implementation claims that need further research, see
+  # https://github.com/mdn/browser-compat-data/issues/22961
+  # - css.types.color.color.relative_syntax
+  # - css.types.color.hsl.relative_syntax
+  # - css.types.color.hwb.relative_syntax
+  # - css.types.color.lch.relative_syntax
+  # - css.types.color.oklch.relative_syntax
+  # Seemingly incorrect notes, see
+  # https://github.com/mdn/browser-compat-data/pull/22960
+  # - css.types.color.rgb.relative_syntax

feature-group-definitions/relative-color.yml

@@ -3,12 +3,21 @@ description: "The `from` keyword for color functions (`color()`, `hsl()`, `oklch
 spec: https://drafts.csswg.org/css-color-5/#relative-colors
 caniuse: css-relative-colors
 usage_stats: https://chromestatus.com/metrics/feature/timeline/popularity/4632
+# TODO: Revisit when this has shipped in Firefox if we should retroactively
+# claim partial support in Chrome and Safari for some versions. If so, also make
+# the same changes in caniuse.
 compat_features:
-  - css.types.color.color.relative_syntax
-  - css.types.color.hsl.relative_syntax
-  - css.types.color.hwb.relative_syntax
+  # These are the only two features that don't use partial implementation for
+  # some browser, so they can represent initial support for the feature.
   - css.types.color.lab.relative_syntax
-  - css.types.color.lch.relative_syntax
   - css.types.color.oklab.relative_syntax
-  - css.types.color.oklch.relative_syntax
-  - css.types.color.rgb.relative_syntax
+  # Partial implementation claims that need further research, see
+  # https://github.com/mdn/browser-compat-data/issues/22961
+  # - css.types.color.color.relative_syntax
+  # - css.types.color.hsl.relative_syntax
+  # - css.types.color.hwb.relative_syntax
+  # - css.types.color.lch.relative_syntax
+  # - css.types.color.oklch.relative_syntax
+  # Seemingly incorrect notes, see
+  # https://github.com/mdn/browser-compat-data/pull/22960
+  # - css.types.color.rgb.relative_syntax