What viral internet fad of 2015 involved a dress that some people saw as blue and black while others saw as white and gold?

In 2015, a simple photograph of a garment sparked a worldwide debate that consumed the internet: what color was it? Millions of people were sharply divided, with some seeing the item as blue and black, while others vehemently argued it was white and gold. This viral phenomenon quickly became known as "The Dress."

The reason behind this widespread disagreement lies in the fascinating complexities of human color perception. The original photograph of the dress, worn by a mother of the bride at a wedding in Scotland, was overexposed and had poor white balance, making the illumination source ambiguous. Our brains constantly try to interpret the lighting conditions of an image to determine the "true" colors of objects. Depending on whether an individual's brain assumed the dress was in a shadow (which tends to have a bluish tint) or illuminated by artificial, yellowish light, it would "subtract" different colors, leading to vastly different perceptions.

Those who perceived the lighting as bluish, like a shadow, often mentally subtracted the blue light, causing them to see the dress as white and gold. Conversely, those who assumed yellowish artificial light would subtract that color, resulting in a perception of blue and black. The dress itself was, in reality, blue and black. However, the ambiguous photograph created a powerful optical illusion, revealing how deeply our individual assumptions about lighting influence what we see.

The "Dressgate" phenomenon transcended mere internet chatter, becoming a significant subject of study for neuroscientists and vision scientists. It highlighted that color perception is not always an objective process but can be a subjective interpretation by the brain. The viral sensation demonstrated that even when looking at the exact same image, people can sincerely see the world in fundamentally different ways, sparking countless discussions and studies into this remarkable aspect of human vision.