I was thinking the other day while reading a Southern Pacific book; which railroad had the most different paint schemes on their passenger car fleets? The Southern Pacific had many. So did the New Haven Railroad. Al Staufer, author of "Thoroughbreds", the story of the NYC Hudsons, says that the NYC had the most varied paint schemes on their passenger cars of any railroad. Those are my 3 picks for the most varied paint schemes on their passenger car fleets. I'm using the time frame from, say, the 1930's through 1960. And I'm not referring to special paint schemes on one or 2 cars; I'm talking whole train sets.
So please chime in if you are knowledgeable in this area. And if possible, list the various schemes and the time frames when they were in use.