Is it white and gold or blue and black? The truth behind the dress debate. CooperVision Eleven years ago, a single photo posted on Tumblr sparked one of the biggest internet debates of all time. The dress instantly divided the world, some swore it was white and gold, What colour is the dress? Why some people see white and gold and others see blue and black National Post Popular Sparkly Dress Colors You'll See On Your #FYP Windsor 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 The Dress Debate: Science Explains Why Some See Blue And Black And Others White And Gold