Is colour perception?

This is one of my little ideas. I get these sometimes. Like when I thought about whether time exists. But that another post.
Is colour a perception? Its all about how we see the world. Literally. We see things in our head. the objects are before us, and our minds build a picture to describe what is there. Our eyes give us things like distance and movement. But we see things through a series of electrical impulses in our heads.
So this come round to colour. We see things from light rays bouncing off objects and into our eyes. Colour comes from objects absorbing some of the light, or something similar. I think it involves the spectrum somehow. (I apologise to my science teacher if I'm getting this wrong or mixed up. my mind isn't on science right now.) But basicaly, light just paints the image in our heads.
So if colour is the type of light reaching our retinas and travelling through our brains to create the image we call sight, how can we tell there is any colour there at all?

If you have any questions ( I guess you have a few,) post a comment.