What is colour and is yours the same as mine?
“For a long time, people believed that colours were objective, physical properties of objects or of the light that bounced off them. Even today, science teachers regale their students with stories about Isaac Newton and his prism experiment, telling them how different wavelengths of light produce the rainbow of hues around us.But this theory isn’t really true. Different wavelengths of light do exist independently of us but they only become colours inside our bodies. Colour is ultimately a neurological process whereby photons are detected by light-sensitive cells in our eyes, transformed into electrical signals and sent to our brain, where, in a series of complex calculations, our visual cortex converts them into “colour”.
Most experts now agree that colour, as commonly understood, doesn’t inhabit the physical world at all but exists in the eyes or minds of its beholders. They argue that if a tree fell in a forest and no one was there to see it, its leaves would be colourless – and so would everything else. To put it another way: there is no such thing as colour; there are only the people who perceive it.”
This is a quote from a fascinating article about how we perceive colour. Indeed the piece comes to the conclusion that there is no such thing as (objective) colour. It seems that colour is in the eyes of the beholder.