Uh... at a guess I'd say Military, although I haven't exactly worked towards creating an outfit for that set so I'm not absolutely certain. They're not the most expensive of accessories, but then the price would depend on what kind you were after - Military Glasses or Vertical Vents would be much more expensive than a Canteen or (Vog forbid) Knight Vision Goggles.

There's Prismatic, too, which would definitely go with any Rose Regalia. Not sure how much you'd be willing to spend on outfitting your costume though, since they tend to go for well over a hundred thousand.