We need colour. In fact, our ability to see colour is one of things that enable us to survive and continue to exist? For example, if we saw everything in neutrals (greys, white and black) we wouldn’t be able to tell when a traffic light was telling us to stop or to go, Snooker would be incredibly difficult to play and we couldn’t decide which shade of Farah Shirts we would like to wear. Luckily we can see colour and https://www.ejmenswear.com/men/farah/t-shirt have a great variety to choose from.
Colour is light. How we see the light is defined by our eye interpretation of it. Not every mammal can do this. Dogs and Guinea Pigs, for example, cannot see certain colours and are effectively colourblind.
The colour that we see is simply the wavelengths of light. White is a combination of all the colours together. A famous example is the fast spinning of a multi color disc. At first the brain can register the colours. This then becomes a nondescript grey as the colours merge. Black is the absence of all colours. Therefore it is also the absence of all light.