Is it white and gold or blue and black? The truth behind the dress debate. CooperVision Optical illusion renews blue and black dress debate nine years on Express.co.uk White and gold or blue and black? What colour is the dress? London Evening Standard The Standard 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. ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive