ngraham added a comment.
Urgh, never mind, it was my fault all along. There was some cache somewhere; bumping the version number of the plasma theme fixed the issue entirely. I'm sorry for wasting your time. :( I'm happy with this now, though now that it's all working, there are two nice-to-have changes that I'd like: - Restore the subtle outlines around the background circles; those helped with contrast against dark backgrounds, and they looked just plain good IMHO - Address @ndavis's suggestion and un-hard-code the colors Thanks so much for your work here, Phil! REPOSITORY R242 Plasma Framework (Library) REVISION DETAIL https://phabricator.kde.org/D15999 To: pstefan, ngraham, #vdg, ndavis Cc: ndavis, broulik, filipf, kde-frameworks-devel, michaelh, ngraham, bruns