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 ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive Women behind dress that broke the internet speak out almost a decade later It's official: The Dress is blue and black Viral online dress debate turns 10. What colours do you see?