Both Uses of

bronze
in
Atlas Shrugged

He saw the reddish-bronze sparkle of her hair-as she sat, head bent, under a light-and a wedge of smooth, glowing skin on her shoulder.
Chpt 1.9 *

bronze = reddish-brown or yellowish-brown

She wore a tailored housecoat of russet-colored brocade that blended with the bronze of her hair, the severe simplicity of its lines serving as her only ornament.
Chpt 3.4

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