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 Remember when the internet went absolutely nuts on the colour of a dress? The dress was blue and black. The original viral poster, Caitlin McNeill, later said it was a black and blue dress Blue and Black or White and Gold? Dress Confuses Many; There's a Possible Explanation The Epoch Times Here's why people saw the dress differently.