In 2015, a photograph of a dress went viral, dividing viewers over whether its colors were blue and black or white and gold. This optical illusion highlighted differences in human color perception White Tie Dress Code: What it Means & How to Dress 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 The Dress Debate SETTLED: Black And Blue Or White And Gold? TODAY Here's why people saw the dress differently. PatBo Cut out Flutter Sleeve Maxi Blue Dress US:8 eBay