what is the significance of "the color of gold"

In "Death of a Salesman," the color "gold" is primarily used to symbolize the illusion of success, the American Dream, and Willy Loman's idealized vision of his son Biff, often associated with Biff's athletic glory days, where he is described as being bathed in a "golden light" during his high school football career; essentially representing the potential for greatness that Willy sees in Biff, but ultimately remains unrealized.