Add support for extended color interpolation (using the OKLab interpolation method as the CSS Color spec say) whenever either of the keyframes is not a legacy color.
Created attachment 462602 [details] Patch Blocked on PR for https://bugs.webkit.org/show_bug.cgi?id=242185 landing, but otherwise ready to go.
<rdar://problem/100437917>
Pull request: https://github.com/WebKit/WebKit/pull/4734
Committed 254960@main (1140e61c6340): <https://commits.webkit.org/254960@main> Reviewed commits have been landed. Closing PR #4734 and removing active labels.