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 ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive 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 Groom Who Helped Make 'The Dress' Go Viral Accused of Attempted Murder The dress is black & blue, but here's why you can't tell TJ Kelly TheDress couple: 'we were completely left out from the story' BBC News