10 years ago, a simple photograph of a dress sparked a global debate unlike anything seen online before. Posted in 2015, the image caused people to argue intensely over whether the dress The Dress Debate Black and Blue or White and Gold British Vogue British Vogue Thedress: 'It's been quite stressful having to deal with it we had a falling out' Internet The Guardian 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 Optical illusion renews blue and black dress debate nine years on Express.co.uk