I always saw it as white and gold, but this super video from Rosa Lafer-Sousa proves that it’s all in how the lighting of the scene is perceived. Very simple, very elegant explanation.
There is a side by side shot where you see both versions at once. I paused the video and checked the colours of the dress with Apple’s excellent colour picker. It’s true! The identical dress can be perceived in (at least) two ways, dependent on the background.
via the Guardian