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 was a 2015 online viral phenomenon centred on a photograph of a dress. Viewers disagreed on whether the dress was blue and black, or white and gold : r wikipedia What color is the dress? : r opticalillusions Can you believe it's been 10 years already? In 2015, this dress a blue and black dress illusion TikTok