A app. to sdjust all video settings?

My monitor has looked off to me for a few months, like I can take a screenshot & make it look right to me using contrast & brightness in Gimp… In Nvidia Control panel they don’t seem to do the sam, sorry anyway, is there a way to use calibration software with out a colorimeter? Every one else doesn’t ssee a prob. but it doesn’t look right for me. Like a film is over it. I do see 2 eye specailists though so it is prob. me, but I am so sad about it. Monitor is
LG UltraGear 32GR93U-B

Please, provide some details:

  • which distribution are you using? i.e. Kubuntu, Linux Mint, Debian, Arch, Fedora, etc.
  • are you using wayland or x11?
  • which KDE version are you using?
  • are you using HDR?
  • is the problem unique to specific apps, a specific display, or the system as a whole?

There are a bit too many variables to troubleshoot, let’s narrow the search area a little first.