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 The dress: Celebrities join the white and gold or blue and black debate Daily Mail Online 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 perception White or blue? Neuroscientist solves mystery of dress that broke internet in 2015 World News