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I'd like my screen to be darker. I can dim the screen up to a point, and I can use themeing to get apps to display with dark colours, but most of the web uses white backgrounds that contrast heavily with my desktop.

I'd like to use a colour profile (ICC, ICM) with whole screen colour correction to darken the screen as a whole.

Do such profiles exist? Is there a linux tool I can use to create them?

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You might want to have a look at F.lux; it changes the colors of your screen depending on the time of day. I think it's able to also darken the white to something more reddish, which is more comforting for the eyes at night.

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    Thanks, I like the low colour temperatures. I've tried xflux, then redshift ( jonls.dk/redshift — GPLed, has basic geolocation and XrandR support).
    – Tobu
    Jun 24, 2010 at 21:39
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It depends on your video driver. The most generic is to use Gamma in the xorg.conf Monitor section. Some proprietary drivers (e.g. nVidia) have preference panels for setting monitor gamma.

I use nvidia-settings to set gamma on my main machine mostly because I hate mucking with xorg.conf files. ICM is probably overkill for your intended use.

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    I've just tried xgamma -gamma .8, but unfortunately the gamma doesn't affect the whites, and I want a darker white.
    – Tobu
    Jun 24, 2010 at 15:45
  • Lower your monitor brightness or color temperature. A white pixel is white. You have to change what your output device considers "full intensity"
    – msw
    Jun 24, 2010 at 15:49
  • Right, done, but I don't have much range there. Gamma > 1 can flatten the white end of the spectrum, but makes it brighter overall, and I'll have to find a software solution to make the white end less bright.
    – Tobu
    Jun 24, 2010 at 16:05

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