Actually, my original intention was to highlight using blue on the black robes, and pick out details with other colors. The dead samurai will be painted more than likely in red armor. The minion monks will be black robes too, but more grayish as you mentioned. The Leader figure is a Kensei miniature as are his minions (not pictured). The dead samurai are Perry minis.
SOhei Hero:
his minions
and the Perry dead Samurai lot, I just used three of them, I have the other two models in a bag