I'd personally prefer the darker pair, I think they match up to the Sporran better (wasn't there a thread about that a few months ago?). But if you like the lighter ones, I see nothing wrong with it.

I saw Charlie Zahm at the Richmond games this past weekend. He was wearing Ghillies this time, but in the past I've seen him wear a dark colored calf length moccasin type boot which looks really great with his kilts.