Well I have done a bit of research into this , and this is what I have found ,....... Panzer (tank crews) had pink piping assault gun , artillery crews had red piping , I always thought it was the other way around however many sites and books have stated the opposite , so I will have to go with that , medics had blue ,infantry white luftwaffe was yellow ? not sure there as I am a ground modeler Ss I believe had silver on regular infantry