You may want to visit these forums:

http://www.authentic-campaigner.com/forum/index.php

http://www.cwreenactors.com/forum/index.php

There is no short, simple answer to the uniform question. It is not what color was popular but what color material was being supplied at what time and it varied.

Do a SEARCH on the above forums for your questions as the subjects have been discussed at length. It would be best not to post the question as you may get the answer to "do a search".