OK, I have seen pink gold that's really pink, peach gold that's really peach, yellow gold that's really yellow, white gold that's really white, and purple gold that's really purple though it's not really workable. Green gold is only slightly green-ish, and apparently blue-green gold isn't much better. Deep green gold may be green, but the cadmium makes it a Bad Idea. That leaves me thinking about red gold - Au with Cu - and blue gold - Au with Fe - as possibilities.
With gold prices being so high, has anyone here used these before? Are they indeed red and blue? How tarnish-resistant are they?