Neuroscientists Explain Discrepancy Behind "The Dress" Illusion Remember when the internet went absolutely nuts on the colour of a dress? The dress was blue and black. The original viral poster, Caitlin McNeill, later said it was a black and blue dress First brain scan study to feature THAT dress BPS 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