Macbook screen color problem

[djchuckdeez]

I have no idea what happened to the coloring of my laptop. I picked it up, set it down and It looks like it has the "negative" exposure.

Here is a screen:

How do I fix this?!

 

[AlliOop]

Surprised no one answered this after so long, and you probably figured this out, but for someone else's sake:

You probably accidentally pressed the right combo of buttons, the shortcut to invert the display:
Control+option+Command+8

Hope this helps someone out there. 🙂