Want to add more wrinkles to that ol' brain of yours? Stare at the colored dots on the girl's nose in the photo above for 30 seconds. Then look at a white surface (blank browser, mayhaps) and start blinking. You should see a non-negative image of the girl. WHAT. BRAIN. MELTING. WHAT. OHMYGOD. Yep, that jiggly stuff in your head just processed a negative image. Sweet. [PetaPixel]
This effect has been known for a long time and it can be pretty cool (and even useful). As a kid I learned of this and spent a lot of time drawing negative images in crayon/marker only to stare at them and get the proper colors when then staring at a white wall. It's really easy too. Just use the opposite side of the color wheel (and black=white) in your image. Voila!
Also, you don't need the three dots at all for this to work.