What is the 'gold' colored alloy that they used for tableware?
There are some Cu based alloys that are very yellow (not orange).
I'll bet that the CDA has literature on the colors of various alloys.
I use a silver brazing alloy that has a gold tint. AWS BAg-3. It's unique with 3% nickel. The wire is quite hard, I don't know if that's the result of work hardening from drawing.