I just bought a Colt CCU and being a lefty I'm having my gunsmith out a Wilson BP ambi safety on it, the problem is we're trying to match it a Ceracoat and were wondering what color grey it is or if anyone has even tried to match it and if so what's the closest grey?
Thanks
ETA; ok I did some research and it's blackened stainless, how do I blacken stainless or should I just stick with the tool steel blued and do it flat black to match the trigger?

The finish is an Ionbond black finish.  Seems pretty durable.  I scratched my rail when I didn't back the screw out enough on my light.  
Black sharpie hides the scratch well.