From a reader:
Is gold a licit primary color for chasubles? I’ve seen it for many Eucharist-themed vestments, but I don’t know if that’s allowed or recommended.
Yes. Gold is allowed in the Latin Church as a primary color for vestments. Gold, as a matter of fact, like white, can substitute for other liturgical colors.
Here is a detail of the fabric of one of my nicer chasubles.