I've been looking for information related to RIO GRANDE steam locomotive colors in the 1940s and 1950s, and found some interesting information from Model Railroader Magazine, September 1944 edition.
On page #391 it states:
Cab exterior, black Duco.
Cab interior, medium green.
Cylinders, pilots, running gear, black enamel
Smoke box. fire box, front-end paint
Boiler and cylinder jackets, dark olive green enamel.
Lettering, tire rims. edge of running board, aluminum paint.
Tender, black Duco.
Diesel Electric Locomotives
Exterior black Dulux.
Exterior lettering and striping, gold Dulux.
Cab interior, engine room. oil engines and accessories. suede-gray Dulux.
Interior lettering, black paint: high voltage warning bright red paint
Roof, underframe, underneath equipment. black Duco.
Body, vestibules, trucks, olive green Duco.
Lettering, yellow paint.
Body, roof, trucks, box and auto cars, freight car red.
Body, roof, trucks. stock and coal cars, black.
Lettering, white paint.
Sides and ends, gray paint.
Roof, Aluminum paint
Trucks, underneath equipment, handholds, black paint.
Lettering, black paint.
So with this knowledge, RIO Grande steam locomotives BOILERS were still being painted Green up till the end of 1944...
Any help or more info on the colors of the engines is greatly appreciated. .. I'm trying to research mainly which of the L-105s engines retained their Green Boilers