The color is golden (brass).
Of course it is a metal alloy, and its color is very hard to show on monitors, but it is shiny gold color.
This pin with coat of arms has been discontinued. Will not be sold anymore once these are gone.
Holy see coat of arms pin
Blessed by Pope Francis during public blessing in Saint Peter
The keys refer to the promise of Christ to Peter, "I will entrust to you the keys of the kingdom of heaven. Whatever you declare bound on earth shall be bound in heaven; whatever you declare loosed on earth shall be loosed in heaven."They are a symbol of the power the Catholic Church believes that Christ gave to Saint Peter and his successors, with the gold key signifying that the power reaches to heaven and the silver key that it extends to all the faithful on earth, the interlacing indicating the linking between the two aspects of the power, and the handles of the key being at the base to symbolize the power being in the hands of the pope.