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 11 years ago today, a dress was posted on Tumblr. It was later confirmed to be Black and Blue. 1920s Flapper Dresses WardrobeShop Tagged "Blue" The Dress: A Black and Blue Debate Over the Color of a Dress Stirs Social Media WSJ 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 viral "black and blue" dress, which sparked a massive 2015 internet debate, was originally posted on Tumblr by Scottish singer Caitlin McNeill. The photo, depicting a Roman Originals dress, divided viewers