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 10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether the dress Dark Blue Dress Explained TikTok