When the state or municipality orders a tractor, truck, car, etc., the manufacturers are willing to paint it any color that they want just to get the order. If it is going to be a special order build unit, it is easy to change the color to what they want. Ever notice police cars when they are being delivered? They get the two tone paint right from the factory just the way they want it. MA even has their two tone grey/blue colors done at the factory.... You can tell, because the door jambs are also the body color....