Optical illusion renews blue and black dress debate nine years on Express.co.uk 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. Women's Blue Watercolor Dress 12th Tribe Wonder Woman? Never heard of her. @haileybieber delivered one of the night's boldest #MetGala moments in a molten gold and cobalt @ysl look that feels straight out of a fashion comic book. Tap the Women's German Dirndl Dress Blue Gold XXL