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How can the colors of a single window be inverted in OS X?

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Please add some description of what you're looking for. "Inverted" window colors is a bit ambiguous. – Jeff Swensen Jan 29 '11 at 3:22
Not what you asked for, but could be useful to someone: To perform this change globally, press ctrl-opt-cmd-8. – Nathan Greenstein Jan 29 '11 at 4:37

++ctrl+8 does the whole screen if that helps.

You could make the window full screen!

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You can use Command ⌘+Option ⌥+Control ⌃+8 to invert the video colours of the whole screen.

There's no way to just invert the colours of a single window.

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Hmm. There definitely used to be. In 10.4. – isomorphismes Feb 5 '13 at 23:10

In Mountain Lion, the Ctrl+Opt+Cmd+8 shortcut was deactivated. I first had to activate it for it to work via Keyboard Shortcuts in the System Preferences in the Accessibility tab.

keyboard preferences showing accessilibilty tab

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Black light software does it, and it does even more.

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Black light works on a screen-by-screen basis, but not by app or window. – Jowie May 12 at 14:07

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