Both Uses of

bronze
in
Main Street, by Sinclair Lewis

And those others had so much that Gopher Prairie complacently lacked—the world of gaiety and adventure, of music and the integrity of bronze, of remembered mists from tropic isles and Paris nights and the walls of Bagdad, of industrial justice and a God who spake not in doggerel hymns.
Chpt 10 *

bronze = a type of metal

Thus on April first, among dappled hills and the bronze of scrub oaks, while Kennicott seesawed on his toes and chuckled, "Wonder what Hugh'll say when he sees us?"
Chpt 34 *

bronze = yellowish-brown

Definitions:

(1) (bronze as in: bronze won't corrode in salt water)
a brownish-colored metal with red or yellow hues that is made of copper and (usually) tin

Bronze metals in the Olympics and many other contests are awarded for third place.

With the discovery of bronze (about 3,000 BC), people could make tools and weapons that were harder and more durable than those made of copper and stone that preceded bronze.
(2) (bronze as in: a bronze tan)
a reddish-brown or yellowish-brown color like that of one of the metals with the same name -- often used to refer to a suntan or a dark glowing complexion
(3) (bronze as in: her bronze is on display)
something made of the brownish metal with the same name -- such as a sculpture (statue) or a third place medal