art people - what's a good resource for learning color?

[Kaido]

I did a lot of artwork back in high school, but mostly with pencil and technical pens. Black and white stuff. I took one painting class, but I had a hard time with it because I wasn't used to using color. Is there some kind of good book on painting and color? I dug up my old airbrush and I want to get back into it. Thanks