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 Dress colour mystery solved? Expert says we're ALL RIGHT and here's why The Mirror 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 In 2015, a photograph of a dress went viral, dividing viewers over whether its colors were blue and black or white and gold. This optical illusion highlighted differences in human color What Color is this dress, Blue & Black or White & Gold? Perception Explained: Why We See things Differently., This 2015 photo broke the internet by revealing something wild about how your brain Is the dress blue black or white gold? Body Worlds Amsterdam