Bad Astronomy Another brain-frying optical illusion: What color

The spheres in an optical illusion appear to be different colors, but they are actually all the same.

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12 fascinating optical illusions show how color can trick the eye - The Washington Post

Dark Lightning (A Thunder and Lightning Novel): Varley, John: 9780425274071: : Books

Optical illusion that causes brain to IMAGINE color that doesn't exist leaves the internet baffled

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Trick your brain: black and white photo turns to colour! - Colour: The Spectrum of Science - BBC

The brain-bending secret behind hundreds of optical illusions has finally been revealed

Optical illusion that causes brain to IMAGINE color that doesn't exist leaves the internet baffled

Magic mushrooms' effects illuminated in brain imaging studies. : r/science