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 Long Glitter Prom Dress with Empire Waist PromGirl How "The Dress" Became an Illusion Unlike Any Other Scientific American Pink And Gold Dress Illusion Lady In Pink Dress Optical Illusion Explained White Gold Dress Illusion Black Blue Yellow White Dress The Dress Explanation White And Gold Yellow What Color is This Dress? Is it Under or Over Exposed? PetaPixel