I've been thinking about "the dress" for 10 years. Here's what I've learned. Long Black Prom Dress with Contrasting Beads PromGirl Black Hot Pink XSmall Women's Black White, Size L ined Active Dress, Size L by Gold Hinge Dressgate: If you saw THAT dress as white your brain was working overtime 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