Ten years ago, a photo of a dress posted on Tumblr sparked a massive debate: was it blue and black or white and gold? Millions argued online, and even celebrities joined in. Scientists later explained 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 The Science Behind the Black and Blue (or White and Gold) Dress What the Blue Black White Gold Dress Tells Us About How We View Color Jerry's Artarama Blue is Actually the New Black: The Science Behind THAT Illusionary Dress