i have no idea what your hypothetical indians wear, or for that matter, what Milo's or Faldages indians wear, but my indians for sure would wear natural earth tones, from 'indian paint pots' -- naturally occuring balls of red and ocher clay, that can be found at clay outcroppings..

my hypothetical indians would be excellent at finding them.. they would supplement their cosmetics with natural carbon (lamp black), and dyes made from berries..