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 Explanation of the Black Blue, White Gold Dress High Latitude Style The Dress Illusion WHITE & GOLD BLUE & BLACK YouTube Here's why people saw the dress differently. Optical illusion renews blue and black dress debate nine years on Express.co.uk The Dress": Why People See White and Gold or Blue and Black