This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see Light Sky Blue Long Prom Dress Evening Party Dresses With Scarf fg7696 formalgowns Light Blue Flowers Off Shoulder A line Long Prom Dress with Slit Light Blue US 10 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