As someone who's fairly new to quilting, I've been relying a lot on using kits. I'm finding that it's helping me begin to see how to choose a little better. I also bought a book (that I was skeptical about when I saw it on another quilt website) and it has turned out to be a great investment! It is "Color Play" by Joen Wolfrom. It has really helped me to understand color theory and I've decided my next quilt will be made using her book. You pick your main color and then she shows you everything that will go with that color and explains why. I think this will be a good resource for you.