Here's why people saw the dress differently. Black and Blue or White and Gold? How Your Brain Sees 'the Dress' Business Insider What colors do you see? Do you see the dress as black and blue or white and gold? This dress sparked a viral debate back in 2015. , This phenomenon, called color constancy, demonstrates how our so we know the dress was black and blue BUT that's not what i'm here to discuss : r opticalillusions 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