A single sporran for very casual to semi-formal?

[Tobus]

MacMillan of Rathdown, just to clarify, are you saying that a full-mask sporran is not appropriate for white tie? I couldn't help but notice your emphasis on the sporran being silver-mounted. It makes perfect sense to me if so, but I was just unaware that a full-mask sporran had a ceiling on its level of formality.

Also, since you brought it up, I notice that all of your levels of formality require silver accessories (kilt pin, etc.). But if an antique brass cantle sporran is OK for "less formal" and "semi-formal", would it not be acceptable to pair it with other brass accents like kilt pin, waistplate, buttons, etc.? Maybe brass buttons on a PC would be weird, but what about a black Argyle? Or what about gold instead of brass?

I guess what I'm asking is whether this is really a "uniform" or not. If one dresses to the correct level of dress, in terms of jacket, hose, tie, etc., does the colour of the metal really make or break the outfit? I would like to think it would be one of those minor details that allows some personal style to peek through without breaking the rules, but I want to be sure.