@chgowiz It's a natural alloy! D: and varies from virtually silver through a nice grey-gold to a soft pale gold --
I knew it via dynastic Egypt/Bronze Age interests in general before I ever made it to D&D, but I'm also pretty sure the /blue/ thing came from 1e/2e FR specifically and only infected D&D-at-large around 3e D&D+ ...
It's really nice imo and deserves better than weird blue colours >.>;;