I posed this to the C&O historical society and haven't had an answer, lets try you guys.
In researching my Cole Bros circus train in 1917, I found a wonderful article about the entire train - a car by car description, right down to the number of horses and what color they were....and a mystery. Train was in Stockton, CA.
Writer raved about the cars, all new, all steel...and "painted in the warm Chesapeake & Ohio colors".
What tha... OK, well, first, Cole Bros has been red since... and second I always thing of C&O as dark blue and yellow.
What possible color combination(s) could be called "warm" for C&O of that era?
If anybody wants a link to the Google Books "Billboard" article this is described in, PM me, I can prove it, but I'm baffled by that.
The following year the owner, J. Augustus Jones, was kicked in the knee by a circus horse, leg shattered, developed infection and died, the entire operation was closed and sold, so there's no other record here, the cars and wagons were all resold to others. That's the only description of the colors I've ever seen.