Remember when the internet went absolutely nuts on the colour of a dress? The dress was blue and black. The original viral poster, Caitlin McNeill, later said it was a black and blue 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 Blue Or Gold Dress Debate Woman discovers the iconic 'Optical Illusion Dress' that went viral in 2015 at yard sale Times of India Women's Gold Designer Dresses Saks Fifth Avenue Stretchy Gold Dress Etsy