A crayon from Silver Swirls
Aztec Gold was a crayon in Silver Swirls, a pack of 24 silvery crayons that Crayola released in 1990. Those crayons had a metallic shine, so #C39953 is only a flat screen version of the color. The crayon is listed with its code in the list of Crayola crayon colors. Outside that crayon box, the name has no real history as a color term.
How it compares
Aztec gold is a soft, sandy gold. It is paler and browner than metallic gold and sits close to antique brass. On a white page its contrast is only 2.62:1, so use it for shapes and borders rather than text.

