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 This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see Light Sky Blue Beaded Formal Dress Evening Prom Gown TheCelebrityDresses