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Re:Show HN: Opinionated Dress Color Simulation by TillE on Friday February 27, 2015 @03:38AM (#9117834)
Objectively the photograph is light blue and brown. It's not even a proper optical illusion, it's just what your assumptions are about lighting and exposure, if you're trying to determine the colors of the actual object from a bad photo.
Re:Show HN: Opinionated Dress Color Simulation by mod on Friday February 27, 2015 @03:40AM (#9117845)
I guess I understand what you mean. I can see the brown when it's pulled off to the side with a hex code, but in the context of the picture, I would always answer that the (brown) part of the dress is "black."

Making the image smaller/cropped/etc doesn't really change that, for whatever reason. Maybe my brain is remembering the context.