Yeah, in a fb group someone was asking what all the helmet symbols meant, and someone had an in-universe answer, which is fine, but all I could think was "the prop guy thought a circle-swirl thing would look cool right there".
In one of moffeaton's RPF videos he mentioned people being hung up on the exact colors of the filming models. People try to color match the models now which are most likely faded and not the exact color when they were filmed. He said he mentioned that to one of the original ILM guys (Lorne Peterson?) and they pretty much said to paint it however you think it should look. They weren't that precious about the meaning of things or colors the way we obsess over them.