I just updated Kubuntu 16.04 (which was updated from 15.10 some while ago, to 16.04 beta) , and now basically on my color schemes have orange in them where they previously had blue. Very strange. Should I possibly wipe my .cache folder?

UPDATE: So clearing the cache doesn't do anything. What's weirder, even if I try to install a new color scheme which shows up having blue elements on kde-look.org, those elements show up orange on my screen! I couldn't find any settings that would cause this (e.g. non in accessibility, or in desktop effects, etc.

Ok, so obviously it was a driver issue. I had the padoka ppa enabled for bleeding edge radeon drivers. I purged it and all is good again.