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 Cable Knit Sweater Dress Black 10 years ago today, this infamous dress was posted on the internet, causing the viral debate on whether it was blue and black or white and gold. The phenomenon revealed differences in Blue and black, or white and gold: what colour is the dress? Photo finally solves the black and blue white and gold dress debate Science explains why people can't agree on the color of this dress CBS News