Due to a change in NSPopoverColorWell's implementation, the layout of the color picker when suggested colors are specified is broken on 10.13.
Created attachment 348446 [details]
Comment on attachment 348446 [details]
Clearing flags on attachment: 348446
Committed r235507: <https://trac.webkit.org/changeset/235507>
All reviewed patches have been landed. Closing bug.