Now science wants to tell us that it's merely an optical illusion? That's the suggestion behind the argument that purple ...

While violet hits your eye with a specific wavelength, purple only exists in your perception — a clever construct built from ...

Purple, a color often associated ... but only one of our brains. Red + Blue = Bran glitch? To get an idea of what this optical illusion is about in more detail, we have to see how our eyes work.