Two Tone Colorblock Dress, Black Sale The Blue Door Boutique 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 Strapless Plunge Color Block Gown In Black Ivory Black and White Draped Color Block Gown Christian Siriano Here's why people saw the dress differently. ELI5:Why does this dress appear white gold to some people and black blue to others? : r explainlikeimfive