Photo finally solves the black and blue white and gold dress debate 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 perception 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 Color scientists explain the dress that went viral RIT