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 The dress' went viral 10 years ago and taught us the science of color The Original Clara Nutcracker Gown in Secret Garden Blush Only Little Once so we know the dress was black and blue BUT that's not what i'm here to discuss : r opticalillusions 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 Is This Dress Blue And Black Or White And Gold? Here's What The Experts Say