Monitor looks posterized

So my cat sat on my keyboard and he did something wierd, and I cant figure out how to undo it. My entire monitor looks like it is in negatve, or posterized- I dont even know what to call it. Everything, from the background image to the buttons, to every program opened, is not the color it should be. And when I go into appearance, it won't change anything. Or anything else I have tried.
For example, this screen looks black with white writing and dark green tabs.
Any thoughts?
Powerbook G4 Mac OS X (10.4.2) Titanium

Hi Jellolady,
From your user profile, I see that you have a PowerBook. This section of the forums is for PowerMacs. It's best to post in the right section just in case your issue is a special PowerBook issue.
I can fix this one for you, though. In system preferences, go into Universal Access. In there, you can toggle Black on White/White on Black to get back your appropriate settings.
You cat went and sat on exactly the right key combination to operate a short cut that does exactly this - children are good at it too.
Cheers!
Karl

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laprete,
You're Welcome!
When you opened Universal System Preferences, you may have noticed the key combination that I posted, was displayed under Switch to White on Black, in key symbols.
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Monitor looks posterized

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