Well, if the hose are to go with your eventual collection of Robertson tanks, then I think either the navy or bottle green will work. I still lean toward the bottle green because I think it can work with your tanks for daywear when paired with daywear accessories, and still work for more formal wear when dressed up with the right accessories... I don't think navy makes that transition as well... but keep in mind, I'm prejudiced and just not that big a fan of navy. BTW, IMHO the Robertson Ancient Hunting is a beautiful tartan.