My Plowmaster 100, which is just like yours except that it has steel wheels, is Oliver red with yellow wheels.  I am told that green wheels were also common.

The red paint is Martin-Senour (Napa) no. 99L-3752
The yellow paint is MS (Napa) no. 99L-11611

You can get decals from Dumont.   Ph:  (641)622-2592

And it will plow good, too!