I must warn you, that several of thedrawings shown above are wrong. For example, the Germans used a 1/3 overspray of Dunkelbraun over the Dunkelgrau until 1940-06-12.
After 1943-02-18, it was ordered that the German vehicles should be painted in a Dunkelgelb base, with overspray of Olivgrün and Rotbraun, however it is plausible that the Germans still had some vehicles in Dunkelgrau in the summer of 1943.
For more information, go to
my article about German Panzer camouflage.