9Ns and 2ns were ALL painted Ford Dark Gray -M2888 from the factory. In early 1943, the 2N Ford-Ferguson was modified for a war time vehicle using many outside supplied parts to beef it up and it was called the Moto-Tug. Built under contract with US Navy, they were used on carriers, airfields, and various other places to pull WWII airplanes around with. They were designed with a lower o/a height to slip underneath plane wings and such plus had hydraulic brakes -you wouldn"t trust a normal N"s brakes on a carrier would you? The Tug had a BP paint spec that was also advertised in brochures for military and industrial use stating it could be painted olive drab green or Lusterless Ocean Grey -a bluish tinted shade as Tugs on carriers were painted. What is the serial number of your "41? Moto-Tugs used a US Navy code -BNO prefix on the Tugs. Sounds like your tractor was painted by someone using those colors.
Tim "PloughNman" Daley(MI)