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 NicoBlu Noor Long Black Tunic Dress with Gold Embellishment Petite 14 Dazzling Gold and Blue Ombre Sequin Trumpet Prom Dress Why is it so hard for people to see black and blue?' Salvation Army uses 'The Dress' to talk about domestic abuse Orange County Register