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 Is This Dress Blue And Black Or White And Gold? Here's What The Experts Say The Dress Illusion WHITE & GOLD BLUE & BLACK YouTube The dress was black and blue, but the conditions of the photograph caused many to perceive it as white and gold, creating debate. Within a week, more than ten million tweets had White and gold or blue and black what colour is the dress? An eyewitness gives a definitive answer The Independent The Independent