Re: [csswg-drafts] [css-color][css-animations] Is it specified anywhere that a color animation at time=0 exactly match the from color's computed value? (#13269)

The CSS Working Group just discussed `[css-color][css-animations] Is it specified anywhere that a color animation at time=0 exactly match the from color's computed value?`, and agreed to the following:

* `RESOLVED: Update the animations spec with an example`

<details><summary>The full IRC log of that discussion</summary>
&lt;fantasai> ChrisL: If you're not interpolating, then you don't do any color interpolation, so the color shouldn't change.<br>
&lt;emilio> ChrisL: I don't think it's explicit but I think it should, I think the birtles mentioned it falls out of the spec<br>
&lt;flackr> q+<br>
&lt;emilio> ChrisL: in the start and end you get the computed value<br>
&lt;emilio> ack flackr<br>
&lt;emilio> flackr: that's right<br>
&lt;emilio> ... there are cases where before / after the keyframe you have a different form because your interpolation dependends the other keyframe<br>
&lt;emilio> ... so before a keyframe could have a different shape than after<br>
&lt;emilio> ... so makes sense that at the keyframe you get the explicit keyframe behavior<br>
&lt;TabAtkins> A -> X and X -> B might interpret X differently in the two cases<br>
&lt;TabAtkins> so we should preserve the X value as specified so it can properly reinterpret<br>
&lt;emilio> astearns: so the test is correct and we just need to be explicit about why<br>
&lt;emilio> ChrisL: so we should add more tests<br>
&lt;emilio> astearns: maybe adding a color example?<br>
&lt;emilio> PROPOSED: Update the spec with an example<br>
&lt;emilio> PROPOSED: Update the animations spec with an example<br>
&lt;emilio> RESOLVED: Update the animations spec with an example<br>
</details>


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Received on Tuesday, 31 March 2026 22:37:29 UTC