Eleven years ago today, an image of a dress posted on Tumblr, a social networking platform, ignited a global online debate over whether it was white and gold or blue and black. 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 Black and Gold Dresses Collection Lady Black Tie Why did some people see a gold and white dress? Our Brain