Re: [w3ctag/design-reviews] FYI Review of CSS Fonts 4 `font-palette`and `@font-palette-values` (Issue #719)

> In the current spec, `override-colors` does not support `var()`, which affects the developer's actual experience, and we have to define a lot of duplicate colors.

Why not? From https://www.w3.org/TR/css-fonts-4/#font-palette-values

> Functions such as [calc()](https://www.w3.org/TR/css-values-4/#funcdef-calc), [var()](https://www.w3.org/TR/css-variables-1/#funcdef-var), and [env()](https://drafts.csswg.org/css-env-1/#funcdef-env) are valid within the braces of a [@font-palette-values](https://www.w3.org/TR/css-fonts-4/#at-ruledef-font-palette-values) rule. They are evaluated within the context of the root element. Relative units are also evaluated within the context of the root element.

I interpret to mean `var()` being valid in `override-colors`.

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