RJR Fabrics is an online fabric resource for quilters. Besides having great fabrics, there are 50+ RJR free patterns and another approx. 30 designers patterns that are free to download using Adobe Reader.
There is a “Learn to Color Shade” page that has a quilt skeleton on it.. by clicking the block you would like to shade, it will bring up a color chart that will allow you to choose the beginning and ending shades you would like to have. It then gives you all the shades and then pulls up suggested fabric swatches that will give you those shades. Love this!