Indian red vs burnt sienna

Indian red and burnt sienna both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian red	Yes	No	No	No
burnt sienna	Yes	No	No	No

As nouns, burnt sienna is a hypernym of Indian red; that is, burnt sienna is a word with a broader meaning than Indian red:

Indian red: a reddish-brown color resembling the red soil used as body paint by American Indians
burnt sienna: a shade of brown with a tinge of red

Other hypernyms of Indian red include mahogany, reddish brown, sepia, Venetian red.

Indian red (noun)	burnt sienna (noun)
a reddish-brown color resembling the red soil used as body paint by American Indians	a shade of brown with a tinge of red
a red soil containing ferric oxide; often used as a pigment	a reddish-brown pigment produced by roasting sienna
a red pigment composed in part from ferric oxide which is often used in paints and cosmetics