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 Velvi Sutton Slip Dress Dusty Blue Size Small Charming Royal Blue Long Prom Dresses With Beaded,Black Girls Prom Gow Simplepromdress Amazon.com: Trends International Gallery Pops Disney Frozen Elsa Original Blue Dress Wall Art Wall Poster, 12" x 12", Black Framed Version: Posters & Prints Is This Dress Blue And Black Or White And Gold? News9.com The actual dress was black and blue. The confusion came from how lighting and color perception tricked people's brains, making some see it as white and gold. It became a viral example