Jeff, I mixed up what I feel is a fairly close match using Pensy Tuscan Red and Caboose Red, both from Floquil. Just painted up a set of cars for mine, and did my best to match the paint, without actuall putting any on the locomotive or tender. Can't give you an exact formula, I just mixed it until it looked good to me. Plus, since I was painting the cars instead of the engine, was not quite as concerned with it matching exactly. Hope this this helps you out. Sully