[csswg-drafts] [css-color-5] Can "relative color syntax" channel constants be used for a channel other than the one it represents? (#6043)

weinig has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-color-5] Can "relative color syntax" channel constants be used for a channel other than the one it represents? ==
In CSS Color 5's Relative color syntax, https://drafts.csswg.org/css-color-5/#relative-colors, the spec is not clear on whether it is valid for a channel constant to be used for channel other than one it represents. For example, is the following valid:

```css
    color: rgb(from teal g b r);
```

I could some value in this ability to permute things, but not a ton. In my investigative implementation in WebKit, I have disallowed this pending more clarity. 

(also, I wrote a bunch of tests for this feature, https://trac.webkit.org/browser/webkit/trunk/LayoutTests/fast/css/parsing-color-mix.html?rev=273244,  but I am not clear if they make sense for WPT at the moment, given the early stage of the spec, please let me know if would be useful to make a PR to add them and I'd be happy to).

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/6043 using your GitHub account


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Received on Saturday, 27 February 2021 18:36:52 UTC