I have lots of Civil War fabric bought from lots of vendors
over the last few years
Reproduction fabric is a good source
Hancock of Paducah is having a monster sale right now - if you have the patience to go thru the various Mfgrs you'll find alot of Civil War repros
Vintage and Vogue in New Hampshire is another source
CW quilt colours vary, but there are lots of blues - greyed blues primarily, some navy, and browns.