The Dress divided the Internet, but it's really about subtraction Science News Black Long Sleeve Dresses Nordstrom Proof the Dress Is Blue PS Tech Is that dress blue & black or white & gold? Matilda's Lab Is This Dress Blue And Black Or White And Gold? Here's What The Experts Say 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