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 Gold and Ivory Printed Maxi Dress Maxi Dresses Saved by the Dress 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 Sheath Sleeveless Straps Plunging Sweep Gold Sequin Prom Dress, Split Princessly The Dress: Blue & Black? White & Gold? Cease & Desist? CNN