This explains how the blue black white gold dress illusion was possible. But it doesn't explain why some people saw it one way and some saw it the other, and no one seemed to see Elegant Date Night Dresses Women's Date Night Outfits & Dinner Date Looks Page 4 Chi Chi London UK Here's why people saw the dress differently. 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