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 ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Decoding the Science Behind the Blue & Black Dress The Science Behind the Dress The New York Times Is This Dress Blue And Black Or White And Gold? Here's What The Experts Say