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 Addison Rae Glitters in Gown First Worn by an Iconic '50s Showgirl Eleven years ago, a single photo posted on Tumblr sparked one of the biggest internet debates of all time. The dress instantly divided the world, some swore it was white and gold, ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive