Stare at the black dot. When it changes to gray, STILL keep your eyes on the dot!! It looks green-ish blue-ish right? But, its gray. This has to do with the fact that your brain gets tired of that black color so, it switches and makes it look like a different brighter more vibrant color. Conclusion? Color is ALL in your head... (stare at dot at ALL times)
I got this idea from Brain Games- TV show. Check them out. They show some really interesting illusions and insanely mess with your brain..
