Small mouth bass in a stained dirty river water love a jig, a big medium brown head with blk/brown or Blk/blue plastic here in Illinois. I always start with the medium brown not tan jig head and 85% of time stay with it. Brown is a winner in nasty water in my book at least for smallmouth, for crappie I usually go with chartreuse & black but maybe I just learned something --time to try/find brown body with chartreuse tail.....................