What Is The Keyboard Shortcut To Invert Colors In OS X Mountain Lion?
The keyboard shortcut to invert colors is no longer available by default in OS X Mountain Lion. You can turn it on via System Preferences though. Once in System Preferences, go to the Keyboard panel and select Accessibility in the sidebar. Then check the box next to "Invert Colors" to enable Control-Option-Command-8 as the shortcut.
Alternatively, you can push Command-Option-F5 to bring up an Accessibility dialog that will let you invert colors on your display.