the best way to help you is to have you go to Michael's site, and click the "Color guides" tab along the top
www.cybermodeler.com/index.shtml
then you would work to fill in any missing spots on your chart, maybe using
www.simmerspaintshop.com
and clicking the "Swatches" tab on the left
I hope I helped you get started
Rex
ps, if you want some chips for different eras, Illiad sells those in sets
http://www.iliad-design.com/