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 & White Contrast Trim Gold Button Dress Explanation of the Black Blue, White Gold Dress High Latitude Style Long Black Sweetheart Prom Dress with Gold Trim PromGirl Is That Dress White and Gold or Blue and Black? The New York Times