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 Understanding the Blue and Black Dress Illusion 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 science behind 'the dress' Original Penguin Golf Veronica Dress Women's Dress Bright White : LG