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 Gold Or Blue Black? Twitter's Divided Again But Not Over A Dress Viral Blue and Black or White and Gold dress marks 10 years Optical illusion renews blue and black dress debate nine years on Express.co.uk Is This Dress Blue And Black Or White And Gold? Here's What The Experts Say