Thanks guys! I'm mostly interested in the early 1970's scheme since that is when I used to see the Vulcan fly at the Barksdale AFB air shows in Bossier, Louisiana. They were semi-gloss with a dark green over a medium gray and a light gray underneath. So which medium grey would that be?
Also, the MPC instructions say Slate Grey for the wheel wells and inner gear doors. What color would that be?