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 What color is the dress? Why do some people see blue and black and some people see gold and white when looking at a single image of a dress? : r askscience The White and Gold (No, Blue and Black!) Dress That Melted the Internet The New York Times The Science Behind the Black and Blue (or White and Gold) Dress