White Gold Or Blue Black? Twitter's Divided Again But Not Over A Dress The Dress Phenomenon, Explained via Color Theory #learntopaint #painting YouTube Optical illusion renews blue and black dress debate nine years on Express.co.uk 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