Originally Posted by qbquilts
I recommend a book called "Color Magic for Quilters" by Ann Seely & Joyce Stewart. It very thoroughly explains the color wheel and the various color harmonies that work well together. It also talks about scale. ISBN: 0875969852. Here's an Amazon link to the book (for reference purposes only) -
http://www.amazon.com/Color-Magic-Qu...0952798&sr=8-1
This is what I was going to suggest. Great book. Also, ck was right on about value. If your friend has the ability to take a pic of her fabrics, have her look at them in gray scale and then sort her fabric accordingly. Color is a tricky thing.