According to the PRR Historical Society passenger car painting and lettering book, both Blue Rapids and Buffalo Rapids were two tone gray for San Francisco Overland service, with Buffalo Rapids being repainted to Yellow, along with Stoney Rapids and Tippecanoe Rapids.
These 2 cars would be fun to include on the decal sheet, but they would need to be black outlined silver, instead of black outlined red.
I plan to use the Atlas/Rivarossi car and add rivets to make it look more like the prototype cars, for Blue or Buffalo Rapids.
Albert Spor