Question: Why is there colour? I don't mean because the reflection of light or the names, I mean why is there different colours? What is the point in them?

Robert Hampson answered on 18 Nov 2014:

Colour is something which isn’t really a property of the world around us, really it is just something you perceive, its kind of in your head.

Colour is the way your brain represents signals sent to it by three different kinds of receptor in your eyes. Each of the receptors are excited by a different wavelength of light. Your brain interprets the signals from each of the detector cells (roughly equivalent to red, blue and green) to build a picture of the world around it. The colour you see is simply a representation of a specific wavelength of light.

There is no real reason to assume we all see the same colours. For example, what I see in my head as red, could be the thing you see in your head as green. However, as we grow up and associate the experience of colour with words and memories we come to mean the same thing with the words we use.

Personally, I believe God created colour and the experience of colour because it is beautiful.