I have a pair of black ghillie brogues that I wear with my Gunn modern kilt and grey horse hair sporran. I recently purchased a grey tweed jacket and waist coat to wear instead of my PC jacket for day wear and a pair of ancient green hose. I already own a black leather day sporran but found wearing my ghillies liked too formal with tweed.

I have a nice pair of tan/light brown brogues that would look great with my kilt and new tweed jacket but no brown belt or sporran. I've seen pictures of guys in black shoes with brown belt/sporran but not the other way around. Is this a no-no or just an unusual combination?