I've seen squadrons that wear orange. And they weren't test pilots.
In my old recruiting pamphlet, most everyone pictured was in orange or khaki flight suits, (before green nomex) both Training Command and Fleet, back in the day. Of course later, and for many years VF114 Aardvarks all wore orange flight suits, although the supply became limited.
Students were issued surplus
white torso harnesses in Meridian in the late '60's. They were ugly (and not the cut-away version either) and much hated. We were told that they were originally made white to "reflect nuclear blasts."
I also had a white nomex flight suit that I got later from a guy in TPS. (I may still have it) Unlike the white torso harness, the white flight suit actually looked sort of OK......but I wouldn't be caught dead wearing it anywhere. It was made for the same nuclear blast reason, I assume.