i used MM SAC bomer tan. it's like a light green. i got it in can form, and then found it was better to paint it by hand. here's a site where i got info on that sorta stuff:
http://www.usarmymodels.com/index.html
got to the 'guide to painting' section, it has stuff on the clothing colors. uniforms has pics from reenactor events. overall its a great site. i have it on my favorites.
hope it helps!!