Stateside or overseas? Normally for officers, it would have been pinks and greens, either with or without the jacket. Dark shirt, dark trousers was a "common" work uniform, also pink trousers and dark shirt. Either cap. For EM, OD shade 33 shirt and trousers, with or without coat, either cap. Both would have had tie, left long with the coat, or tucked under the second button of the shirt. Much of this would have been at the discretion of the unit or post commander, some were strict, some didn't care. I would err on the side of looking soldierly ( ie. neat and pressed, with tie, shoes polished, brass polished etc.). Flight jackets might have been worn, but I would not push it unless you are a flight surgeon, flight jackets were hard to get for non flight personnel. Tanker Jacket were worn
Hope this helps some.