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 Original Black Blue And Gold Dress Illusion The White And Gold (No, Blue And Black!) Plus Embellished Illusion Dress with Side Ruching David's Bridal 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