10 years ago today, this dress was posted online, turning into a viral phenomenon. Viewers couldn't decide if the dress was blue and black, or white and gold. It was later confirmed Ten years ago, a photo of a dress posted on Tumblr sparked a massive debate: was it blue and black or white and gold? Millions argued online, and even celebrities joined in. Scientists later explained 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 TheDress colour debate draws a spectrum of expert, academic views CBC News The original photo of the dress. Dress photograph reproduced with Download Scientific Diagram Pleated Royal Blue Chiffon V neck Evening Party Dress Lunss