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 Exploring the White and Gold Dress Phenomenon 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 That Dress is Blue and Yellow!