LGTM1 Thanks
On Wednesday, May 27, 2026 at 11:09:51 AM UTC-4 Alex Russell wrote: > This seems extremely cool; is there perhaps an Explainer somewhere? This > note on the Mozilla standards position request has most of that content and > might help folks get more comfortable with the proposal as a stand-alone > document; > > > https://github.com/mozilla/standards-positions/issues/1396#issuecomment-4363280736 > > Best, > > Alex > > On Tuesday, May 26, 2026 at 8:38:49 PM UTC-7 Chromestatus wrote: > >> *Contact emails* >> [email protected] >> >> *Specification* >> https://drafts.csswg.org/css-color-5/#relative-alpha >> >> *Summary* >> Relative alpha colors refer to an origin color, and only change the alpha >> channel. The meaning of alpha channels is defined in CSS Color 4 § 4.2 >> Representing Transparency in Colors: the <alpha-value> syntax. >> >> *Blink component* >> Blink>CSS >> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECSS%22> >> >> *Web Feature ID* >> Missing feature >> >> *Motivation* >> Relative alpha colors provide a direct CSS way to derive a translucent >> version of an existing color without rewriting its color channels. Authors >> currently need to duplicate component values or create separate precomputed >> tokens when they want “the same color, different opacity.” The CSS Color 5 >> alpha() function preserves the original color components and only changes >> alpha, which reduces authoring overhead and makes color tokens easier to >> reuse and maintain. >> >> *Initial public proposal* >> *No information provided* >> >> *TAG review* >> *No information provided* >> >> *TAG review status* >> Not applicable >> >> *Goals for experimentation* >> None >> >> *Risks* >> >> >> *Interoperability and Compatibility* >> *No information provided* >> >> *Gecko*: No signal ( >> https://github.com/mozilla/standards-positions/issues/1396) >> >> *WebKit*: No signal ( >> https://github.com/WebKit/standards-positions/issues/657) >> >> *Web developers*: No signals >> >> *Other signals*: >> >> *WebView application risks* >> >> Does this intent deprecate or change behavior of existing APIs, such that >> it has potentially high risk for Android WebView-based applications? >> *No information provided* >> >> >> *Debuggability* >> *No information provided* >> >> *Will this feature be supported on all six Blink platforms (Windows, Mac, >> Linux, ChromeOS, Android, and Android WebView)?* >> Yes >> >> *Is this feature fully tested by web-platform-tests >> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* >> Yes >> >> >> *Flag name on about://flags* >> *No information provided* >> >> *Finch feature name* >> CSSAlphaColorFunction >> >> *Rollout plan* >> Will ship enabled for all users >> >> *Requires code in //chrome?* >> False >> >> *Tracking bug* >> https://issues.chromium.org/issues/492246715 >> >> *Estimated milestones* >> Shipping on desktop 150 >> Shipping on Android 150 >> Shipping on WebView 150 >> >> *Anticipated spec changes* >> >> Open questions about a feature may be a source of future web compat or >> interop issues. Please list open issues (e.g. links to known github issues >> in the project for the feature specification) whose resolution may >> introduce web compat/interop risk (e.g., changing to naming or structure of >> the API in a non-backward-compatible way). >> *No information provided* >> >> *Link to entry on the Chrome Platform Status* >> https://chromestatus.com/feature/5070160203481088?gate=6508530389614592 >> >> *Links to previous Intent discussions* >> Intent to Prototype: >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/69b4e4d0.050a0220.b9121.0139.GAE%40google.com >> >> >> This intent message was generated by Chrome Platform Status >> <https://chromestatus.com>. >> > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/4b6dd5d4-4411-4d41-af2b-008420db8d61n%40chromium.org.
