The dress is black & blue, but here's why you can't tell TJ Kelly Why people see #thedress (the dress) differently Optometrist Explains 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 Applique Wedding Dresses Camille La Vie The world's most famous optical illusion turns 10 years old Creative Bloq