Hi,
Just remeberthat only by April/ May 1941 was issued a RLM directive to change every Luftwaffe aircraft cockpit to RLM 66. Few exceptions to this rule occured, mainly in second line multipurpose aircraft.
Untill tis order came, the standard cockpit colour was RLM 02, only the instrument panels use RLM 66 & other dark hues.
Hope this elped
Best