Helmet is the summer, lightweight type. Boots are one of the standard pattern. Probably have the 'Kanal' pants, in Luftwaffe blue-grey cotton mix material, as worn by the guy on the left in the pic in Post #65, which could be worn over the boots, if lace-up type, or tucked in to the flying boots.
Jacket could be black leather (no standard pattern, as many were privately purchased - the heavier, fur collared type became issue around late 1944, with the trousers), or a cotton twill jacket, similar to the one in the painting you posted, which could be light cream (unlikely for the period), a darker tan/brown, or more usually, Luftwaffe blue grey, like the Kanal pants.