Lately I have been working with Japanese Persimmon Dye. It produces a gorgeous chestnut brown that combines beautifully with Indigo.
Persimmon Dye involves a lengthly process to achieve the darkest colours. The dye is painted onto the fabric and left to bake in the sun. During the first day in the sun the fabric turns a very pale pinky brown. With each succeeding dye and sun exposure the fabric becomes increasingly darker.