@operalinknx1

Agreed. It's worse now in v64 and the opera:flags force color doesn't seem to work. If been reading other browser posts and it seems that Chrome and Firefox also have colour problems of some sort or other.... which makes it possible that the bug lies in the chromium engine rather that Opera itself.

I've found a work around that works (so far) for me. I'm on Opera 63 and if you type "opera:flags" in the address bar you get access to some experimental settings (no guarantees!). Find the #force-color-profile setting and change it to sRGB (very rich colours on my kit) or Display P3 D65 (a more muted colour scheme). HDR settings might have some unexpected effects.