How "The Dress" Became an Illusion Unlike Any Other Scientific American 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 Blue And Black Or White And Gold Dress Illusion What Color Is This Dress, Blue Black This cartoon is the simplest explanation of the color changing dress Vox