I personally, would wait to see if others are experiencing the same issue before I chose to downgrade the kernel. Just a suggestion if you can tolerate the colour issues, in the mean time.
I have an ASUS board with a Ryzen 7 5600G, Ill see if the same blue background is purplish to me and let you know here.
[Edit] So I checked, the blue background is actually a supposed to be looking like that in dark mode. The grey scale one looks as it should too. On my setup.
As noted though, this could be related specifically to the colour management of the Video Card you have installed. Keep an eye out here for similar problems. You could also make sure that your monitors profile is current if you use colour management.
It is not the kernel it selves, mostly the compatibility with newer drivers & configs (also kernel config).
Till this is adjusted it takes a moment. Best would be if ppl report this issues while explaining how to reproduce. This accelerates the process.
In general, bug reports need to go to https://bugzilla.redhat.com/ or, even better, the upstream project bug tracker (in this case probably Mesa). Common Issues is a way to inform the wide audience, but for that, we should first determine that the problem happens to a sizeable portion of our audience. It’s also ideal to have a bit more to say to it - a description of systems affected, a solution, a workaround, or at least the bug link.
The most likely reason is that X11/Xwayland uses non-zeroed memory when creating a buffer for those windows, and in areas where there should be half-transparent shadows there are random colors based on the current memory contents.
So none of the backgrounds are actually broken. They just got changed so looked seriously broken… so my bad there.
I also updated to rawhide again and see that the issue with my xwayland/xorg appa has been resolved already. So I don’t think making an issue would help since the fix will make it’s way to f38 eventually now.