I use Fiebings Pro Oil dye, and the colors I keep in stock are Saddle Tan, Medium Brown,Dark Brown, and Black. I without a doubt use Black the most, probably 10 to 1 over brown,but I also specialize in inlays and alot of my customers prefer black.If you are going to do mostly plain or tooled sheaths , I would get more brown. Remember ,you can also create some custom colors by doing a little mixing.Dave