Rachel Allan 70588 Long Tulle, Applique, Beading Mermaid Dress Fitted, Sleeveless, Strapless, Appliques, Illusion, Corset, Detachable Off Shoulder Puff Sleeves, High Slit, Floor Length, Mid Open Back, Lace Up ADASA What colour is the dress? Explained : r interesting 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 50 Blue Bridesmaid Dresses To Inspire Your Bridal Party