10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether 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 Is The Dress blue and black or white and gold? The answer lies in vision psychology Psychology The Guardian White and gold or blue and black what colour is the dress? An eyewitness gives a definitive answer The Independent The Independent