Akiyoshi Kitaoka is a professor of psychology at Ritsumeikan University in Japan. With a specialization in visual communication, the professor has devoted his life since 2002 to flood the internet mind-numbing optical illusions.
Just look at this brain hurt:
So you see pink stripes sandwiched between green and blue ones. What if we told you there were no blue stripes? The masquerading blue are actually of the same hue as the neighboring green ones.
The optical illusion uses the infamous White's effect. The green stripes are surrounded by different colors, forcing the brain to correct the colors and perceive them differently.
Head over to professor Kitaoka's website here for more mind-bending illusions.