Working with Colour in InDesign CS
http://desktoppub.about.com/od/courses/p/3id_basics.htm

Bruno, Elisabetta
About.com

Abstract:

Explains the use of the Colour Palette and Swatches palette and how they relate to each other. It also briefly covers the Gradient Palette. Informative links explaining the difference between RGB, CMYK, hues, tints, etc. are also provided.