Well, Matt puts up a nice case for using black as casual wear...
I usually use Matt's writings as a solid source of info. That being said, I have seen some nice, mildly furred sporrans that would look great as formal wear (and yeah, they are black). I do always say to follow the second commandment of wearing the kilt: Thou shalt accessorize well. And in all seriousness, the cost for a black leather belt, sporran, strap and shoes, isn't horrendous, and it can easily change up the look of your kilt... black accessories with a nice dress shirt would look pretty sharp, and you are unlikely to clash with anything wearing black.

I like this discussion so far... kinda want to see where it goes. Digging for others' insights and ideas, and not "just" traditionally accepted mediums.

Would anyone think that a guy in a kilt, wearing all brown accessories, and a brown pair of ghillies would be "over dressed?" As I have already purchased all but the brogues, and will use them to top off that particular set.

More thoughts if you please.