Johnson Viking paint colors: From my experience, there are significant variances in the EF Johnson Grey and Maroon.
The maroon varies from a dark brown/maroon to one that is nearly black. The grey varies as well, so restoring areas of the front panel by airbrushing, usually the edges of a panel to match, requires some expert paint matching. It is likely a "one size fits some" scenario; I have a Ranger I and a Valiant I, and these are factory built. The grey for these factory built examples is identical and lighter than other EFJ equipment in my stable.