The spheres in an optical illusion appear to be different colors, but they are actually all the same.
Color Illusions and Color Blind Tests
Bad Astronomy, A Fantastic Optical Illusion: Just Another Brick in the Wall?
Color Illusions and Color Blind Tests
Bad Astronomy, A Fantastic Optical Illusion: Just Another Brick in the Wall?
03: Anomalous Motion Fake Illusions Encore Update By, 56% OFF
Bad Astronomy, This Illusion Knows When You Are Looking at It
Brain Sciences, Free Full-Text
Bad Astronomy, Another brain-frying optical illusion: What color are these spheres?
Color Illusions and Color Blind Tests
Optical illusion that causes brain to IMAGINE color that doesn't exist leaves the internet baffled
The optical illusion that tricks your brain into seeing colour, The Independent
Optical illusion that causes brain to IMAGINE color that doesn't exist leaves the internet baffled
Color Illusions and Color Blind Tests
03: Anomalous Motion Fake Illusions Encore Update By, 56% OFF