At least textFillColor, textStrokeColor, textDecorationColor, textEmphasisColor. They all should have a proper initialization function in RenderStyle which should initialize them to currentcolor (per spec). Currently, they don't have their own initialization function and default-initialized to Color {}, which is invalid and thus is later "interpreted" as currentcolor. This is working "by accident".
Pull request: https://github.com/WebKit/WebKit/pull/4308
Committed 254458@main (466a830e85aa): <https://commits.webkit.org/254458@main> Reviewed commits have been landed. Closing PR #4308 and removing active labels.
<rdar://problem/99889356>