There are two `background-color`s in .content-view.graphics-overview in GraphicsOverviewContentView.css. There should be one background color.
Pull request: https://github.com/WebKit/WebKit/pull/28884
Committed 279246@main (467a1e1b9822): <https://commits.webkit.org/279246@main> Reviewed commits have been landed. Closing PR #28884 and removing active labels.
<rdar://problem/128647756>