Question for automotive painters

I’m not sure if this is the right group but I’m not sure where else to ask. I’ve been bouncing arounds of what color I want to paint my truck when I get around to it, I want it to be unique and I thought of doing a dark blue with a pretty heavy gold or copper flake but I can’t find anything online on it. Does anyone know how this would look or if it would work at all? Also would there be a good way for me to mix up some on my own to test out different mixtures?