The dress' went viral 10 years ago and taught us the science of color 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 White and Gold Dress: The Viral Color Illusion Explained Blue and black or white and gold? A decade later, it turns out the ultra viral optical illusion dress was also a boon to scientific advancement. See link below