I'm using Bazzite on a desktop, nvidia card, using kde. One of my monitors needs an ICC profile. I figured that out, I think. Have to place them in /usr/local/share/color/icc/colord/ manually, then add them with colormgr. Importing tries to place them in /usr/share and fails.
Anyway, in windows after loading the ICC profile I apply an adjustment to this display as well, through the nvidia control panel.
I recently replace my laptop monitor and have noticed it's not as crisp as the only one / my external monitors. In KDE5 there is a "System Settings Module" called Gamma that supplies different test