I wear blues. I have always worn blues on ground tours and even at Nav School when not rescheduled to fly. To resolve the going home issue to get my kit, I kept a spare set at work!
Now, to my chagrin I am told I may have to wear CS95. Do I wear a brevet?
I still have a metal Nav brevet I acquired in NZ. They, and the OZ both wear natty metal badges with their shirts.