Re: [csswg-drafts] [css-values-5] Arbitrary substitution function definition is ambiguous (#13083)

My point is that if a [spec](https://drafts.csswg.org/css-variables-2/#using-variables) defines this... :

  > The value of a custom property can be substituted into the value of another property with the `var()` function.

... an author would think that if `color: rgb(var(--channels))` is valid, `color: var(--custom var(--fallback))` is also valid, unless explicitly specified otherwise.

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Received on Friday, 14 November 2025 08:31:12 UTC