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 perception How "The Dress" Became an Illusion Unlike Any Other Scientific American Dress colour mystery solved? Expert says we're ALL RIGHT and here's why The Mirror 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