caramel brown vs raw sienna

caramel brown and raw sienna both are nouns.

Word	Noun	Adjective	Verb	Adverb
caramel brown	Yes	Yes	No	No
raw sienna	Yes	No	No	No

As nouns, caramel brown and raw sienna are synonyms defined as:

Other synonyms of caramel brown include buff, caramel, yellowish brown.

caramel brown (noun)	raw sienna (noun)
a medium to dark tan color	a medium to dark tan color
	a yellowish-brown pigment made from untreated sienna

caramel brown (adjective)	raw sienna (adjective)
having the color of caramel; of a moderate yellow-brown