They look like US pattern trailers which for use by the AAF should be painted IIRC OD 41 Aircraft Olive, not US Army OD. For early USAF use, they would be painted Insignia Yellow. For USN and USMC use, they might have been red. Depends on who used them.
WIP: Monogram 1/72 B-26 (Snaptite) as 73rd BS B-26, 40-1408, torpedo bomber attempt on Ryujo
Monogram 1/72 B-26 (Snaptite) as 22nd BG B-26, 7-Mile Drome, New Guinea
Minicraft 1/72 B-24D as LB-30, AL-613, "Tough Boy", 28th Composite Group