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 Black Knit Dress PrettyLittleThing USA Dress Blue Or Gold Original Original Blue Black White Gold Dress Thedress The Dress Blue Or The Science of Why No One Agrees on the Color of This Dress WIRED Is That Dress White and Gold or Blue and Black? The New York Times The Dress Illusion WHITE & GOLD BLUE & BLACK YouTube