[kurlannaiskos]

bulletin 41 color Neutral Grey # 43 was 6 parts flat black and 4 parts flat white.
there is no blue in it.

the ANA color ANA 603 is called Neutral/Sea grey and is intended to replace neutral grey 43 and also used as an equivelant color for RAF Ocean grey which does have blue in it.
this was for US-made planes to be sent to British Commonweath countries.

this lighter grey is undoubtably ANA 602 Light grey.

B-17's and P-38's used Olive Drab # 319, a lighter and browner color than
(dark) olive drab # 41 or ANA 613 Olive drab. it is very likely that the P-38 used ANA 602 after NG # 43 was discontinued.