Newly updated css-color WPT tests don't match the spec anymore due to serialization of lab family functions to use the numeric form for lightness. We should update the tests and then upstream them.
<rdar://problem/100231009>
Pull request: https://github.com/WebKit/WebKit/pull/4575
Committed 254741@main (a6b1febb7774): <https://commits.webkit.org/254741@main> Reviewed commits have been landed. Closing PR #4575 and removing active labels.