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 Nightway Women's Illusion Trim One Shoulder Sequin Gown Gold Silver ShopStyle Formal Dresses Gold Sequin Mermaid Prom Dress with Strappy Open Back SQ035 Viniodress What color is the dress? Why do some people see blue and black and some people see gold and white when looking at a single image of a dress? : r askscience