I might add that my US Air Force and US Navy kilts are both predominantly blue. I am retired Air Force ( I wear my insignia of rank as a kilt pin) and my brother is ex-Navy. We are both proud of our service and I'll be damned if some idiot is going to tell me what color tartan I can or cannot wear on my kilt. Also my Loch Ness kilt is mainly a very dark blue (almost black).