Even in George's AUM serial about game making there isn't mentioned a color design document.
Its not only the newbies, there is almost none among us who does something like that, including me.

If you wanna do a basic design chapter, that's great!

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt