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 The Dress Illusion WHITE & GOLD BLUE & BLACK YouTube This Dress is Blue and Black, Right? What Colors do You 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 Optical illusion renews blue and black dress debate nine years on Express.co.uk