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 Black White Gold Dress The Science Of Why No One Agrees On The Color Of White And Gold Dresses REVOLVE Optical illusion renews blue and black dress debate nine years on Express.co.uk Spotlight Snap The science behind the controversial blue black, gold white dress