While the thumbnail renders correcty colors and so does gthumb, Gwenview renders heavily saturated colors.
I tried changing some of the colors in the advanced settings, but nothing made any improvement.
Any ideas?
Make sure you have kde-colord installed and your profile selected.
Between this and your other problems, it sounds like your install is bad.
colord-kde is installed and my profile is selected.
All other apps (Gimp, RT, GThumb etc) render colors correctly. It’s just Gwentview that is off.