William Booth Draper is an excellent supplier for wool. Use broadcloth. I for mine I used a old olive Army Blanket and died them black with Rit Berrys. Salt was used as the surfactant if memory serves. Red leggings were mainly used for Leaders. Some units used red as identity even up to the CW.....Redlegs. Most common colors...Navy Blue....Black...Red...Lighter Blues and all others. For turkey hunting....black...navy blue if you want PC... Browns not really a common color for wool but they are in the realm of possibility. If you want brown and have period concerns, consider leather or Anglo/French long gaiters.