Sepia is a reddish-brown color, named after the rich brown pigment derived from the ink sac of the common cuttlefish. It was used by Leonardo da Vinci for his drawings and wash. It is a colour most familiar for its use in old photographs. The colour varies from almost brown to a reddish brown. French Sepia is probably the most authentic colour as it is derived from the cuttlefish. Indian Red is a reddish brown.