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 How I Flipped My Brain's View of the Black and Blue Dress Jeff Greenhouse WHITE AND GOLD OR BLUE AND BLACK? #whiteandgolddress #blueandblackdress Is it white and gold or blue and black? The truth behind the dress debate. CooperVision Is The Dress blue and black or white and gold? The answer lies in vision psychology Psychology The Guardian