Colours are really coloured light. So when you see red you are seeing red light. Cherries look red because daylight is all the colours of the rainbow – but the cherry skin has soaked up all the others colors, except red. So a cherry bounces only red light toward your eyes.
If you mix the colours red, yellow, and blue together in different combinations, you can get almost any other colour.
When this wheel spins, the coloured dots blur together to make other colours.
Monkeys and many kinds of birds see colours the same way people do. But some animals can’t see colour at all. Scientists think that crocodiles and dogs see colors as different shades of gray. They also think that bees cannot see the colour red.