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 Speed Feed: Is This Dress Gold and White, or Blue and Black? Dressgate: If you saw THAT dress as white your brain was working overtime 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 Unique One Shoulder Illusion Neckline High Split Boho Wedding Dress QW2339 US2 Ivory Spotlight Snap