rust-brown vs rusty

rust-brown and rusty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
rust-brown	No	Yes	No	No
rusty	No	Yes	No	No

As adjectives, rust-brown and rusty are synonyms defined as:

Other synonyms of rust-brown include rust.

rust-brown (adjective)	rusty (adjective)
of the brown color of rust	of the brown color of rust
	ancient
	covered with or consisting of rust
	impaired in skill by neglect