RIT Dye Color Chart. It includes wool, but the wool swatches are weird looking. I wouldn't use Rit on wool unless it was all I could get.
Rit Dye color chart - make a custom color
Gorgeous Overdyed Rug using Rit Dye via SweetPaul.com
PAINTING UPHOLSTERY WITH RIT DYE
How to create an Ombre look with RIT dye, via www.sasinteriors.net
textures and patterns are revealed when colored dye is applied to the wood via a bath
Rit Dye formula (for when I dye slipcovers)
Color mixing guide for Rit Dye. Make over 500 colors from the core dyes.
Rit Dye - Color Mixing Charts
How to Dye Carpet using Rit Dye and a Carpet Cleaner. Such a money saver if you don't like the color, but the carpet is still good.