Mac Duggal Embellished Illusion High Neck Cap Sleeve Gown, Size 14, French Blue Here's why people saw the dress differently. 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 The return of the Black Blue dress illusion and more Optical White Black Dress Illusion Color Illusion Optical Illusion Mustard And Blue Dress Optical Yellow Blue