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Is there a way to invert colors in X. It would be even more useful if the answer was something I could bind to a keyboard shortcut(a command and not a setting that will require a restart if X).

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why do you want to do this? –  akira Nov 9 '10 at 0:10
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i binded that to <C-M-i> so when i can read large texts on firefox or any other program whose colors i canot invert more easily :) –  fakedrake Dec 19 '10 at 10:23

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up vote 9 down vote accepted

You need the xcalib package:

xcalib -i -a
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Unfortunately, this only inverts the colors on one display. –  Artefacto Feb 15 '13 at 13:04
    
xcalib supports the -s, -screen option that may be useful. –  cYrus Feb 15 '13 at 15:56

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