A bit of a minefield (pun intended) as the colour of webbing altered during course of the war from tan through darkening degrees of olive drab as the war went on. But given that you'd've trained and been issued with equipment during 'basic' tan would be fine. As the recovery chaps were more likely to need guns that fired grease than bullets, webbing would be fairly minimal...
M36 pistol belt and as you're a sergeant a belt mounted .45 1911 Colt Holster & 'peice' would be fine with clip pouch and maybe carlisle first aid tin pouch... although (and here the regulation book goes out the window) tank crews (with whom you'd be familiar with, working with and no doubt borrowing from) often had their .45 in shoulder holster. Althought the only downside to that is that the shoulder holster looks odd when empty as it has no flap to cover the grips of the gun, whereas the belt holster dosen't look out of place when empty... unless you're inclined to get a de-act 1911A1.
Hope some of this makes sense