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I've managed to invert the screen with xcalib -alter -invert, but now blue is orange etc.

Isn't there a way to hue-shift the screen colors as well, so only the brightness is inverted and not the hue?

(side note: I figured out I can run OBS with a color correction filter to see my first monitor the way I want. It is a bit hacky though!)

Gavin Haynes
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  • Are you talking about a text screen or graphical desktop environment with application windows, for example gnome-terminal or xterm. Can you use ANSI sequences? – sudodus Jun 12 '21 at 07:16
  • I'm talking about the full graphical desktop environment – Gavin Haynes Jun 12 '21 at 17:43
  • Did you try with the same xcalib command and replace -invert with '-brightness(short-b) according to 'man xcalib at the internet (I have not installed this tool) or some other combination of options? An alternative might be to select another theme for the desktop (switch between a light and a dark theme). Maybe this link will help you: Automatic Light / Dark Mode? – sudodus Jun 12 '21 at 20:18
  • Yeah normally I do xcalib -alter -co 50 once or twice to dim the screen, but it would be even more convenient if I could replace white with black for text without turning people blue in images / videos – Gavin Haynes Jun 18 '21 at 19:20
  • 'replace white with black for text': Do you mean subtitles or text in a terminal window? – sudodus Jun 18 '21 at 19:51

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