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 How "The Dress" Became an Illusion Unlike Any Other Scientific American Viral online dress debate turns 10. What colours do you see? White and gold or blue and black? What colour is the dress? London Evening Standard The Standard The dress and individual differences in the perception of surface properties ScienceDirect