A few colors are wrong.
A few colors show up in lavenders and taupes in error; the rest are fine. This problem just showed up a few days ago; before that, for months, all has been well. It affects pictures, video, the sunflower on my login screen, etc. It occurs in both GNOME and KDE. I cannot think of anything that I've done differently as of late, although I've left my computer running 24/7 recently and screen savers have been popping up. I've tried restarting the computer, to no avail.