in 1943.. for the US planes... the Olive Drab ( FS34088) at tops and Neutral Gery (FS36173) on undersides. Possible , there were the Medium Green ( FS34092) spots at the wing leading and trailing edges and also the same at the horizontal stabilizers , elevators and at the fin and rudder edges.
Later the OD and NG only.
The RAF Dakotas inherited the US camo mostly or were painted with spots of the RAF Dark Green (FS34079 or 34096) / Dark Earth (FS30118 or 30095) at tops and Sky-S type (FS34583 or 34424) or the Neutral Grey on undersides.