Blue Prom Dresses 2026 Navy, Dark & Light Blue Gowns Light Blue Prom Pretty Piece Prom Dresses Two Pieces Off Shoulder Short Sleeve Light Blue Prom How "The Dress" Became an Illusion Unlike Any Other Scientific American 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