So I searched up the black and blue dress : r opticalillusions 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 Original Black Blue And Gold Dress Illusion The White And Gold (No, Blue And Black!) Illusion Blue Or White And Gold Dress Gold Dress Blue Dress Illusion Black And Blue White How "The Dress" Became an Illusion Unlike Any Other Scientific American