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 Black Embellished Tulle Gown with Golden Accents Rose Gold 4 Black Dresses With Gold Accents Windsor Women behind dress that broke the internet speak out almost a decade later The dress is black & blue, but here's why you can't tell TJ Kelly First brain scan study to feature THAT dress BPS