The Dress Illusion WHITE & GOLD BLUE & BLACK YouTube White & Gold Or Blue & Black? Debate Over Dress Color Rages On YouTube In 2015, a photograph of a dress went viral, dividing viewers over whether its colors were blue and black or white and gold. This optical illusion highlighted differences in human color so we know the dress was black and blue BUT that's not what i'm here to discuss : r opticalillusions This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see The dress is blue. Here's why