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 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 Black Satin Maxi Slip Dress with Lace Trim & Slit Marrysol Shop Internet debates that blue dress (it is blue, right?) The Seattle Times