[csswg-drafts] [css-color-5] How should missing (`none`) components work with calc() on named components in the relative color syntax (#6920)

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

== [css-color-5] How should missing (`none`) components work with calc() on named components in the relative color syntax ==
With the addition of [missing components](https://drafts.csswg.org/css-color/#missing) to colors, it would be good to clarify what the behavior is when a missing component is used in a relative color when combined with calc(). For instance:

```css
lab(from lab(none none none) l a calc(b / 2))
```

It would make sense to me that `l` and `a` remain `none` here, but I am less clear on what the specified behavior of `b` should be. Conversion to 0 like done at rendering? Conversion to NaN? Remain `none` and be invalid?

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/6920 using your GitHub account


-- 
Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config

Received on Wednesday, 29 December 2021 17:41:31 UTC