There is a characteristic fading that is not described or illustrated in the "hat" painting guide, but is described and illustrated clearly by photos on the worldwar2.ro site.
It was common for the soldiers' cotton (non-winter) blouses to fade significantly over the course of the year. The trousers held their color much better, as did the officer's blouses and jackets.
So a Romanian trooper characteristically appeared with his top lighter in shade -- to the extent that it looked like their tops were a different color than their pants. This was pronounced enough that it can be noticed clearly even in black-and-white pictures. Officers, on the other hand, appeared to wear uniforms all of one color.
For my micro-armor (GHQ) Romanian army I have chosen Vallejo Khaki as the base color of the uniforms. This is a nice brown-olive shade. I have diluted almost 1-to-1 with white for the tops of the squaddies. It gives a lot of character to the figures when the tops are a noticeably lighter shade. The platoon level officers get all Khaki. The company and battalion officers have a touch of dark green added into the khaki, so that they appear even darker in tone. In the Romanian army officers spent far less time exposing themselves to the rigours of the campaigns, and their uniforms stayed cleaner and newer.
For the Romanian helmets I use Polly-S French Khaki, which is a very green khaki tone. In most color pictures of Romanians in WW2 the helmets are noticeably green. I use the same color for most metal kit from mortar barrels to trucks and tanks (except mid-war German hand-me-downs).
Hope that helps.
-Mk 1
tackles his greatest foe - another Green Vehicle...
