I'll echo the others. It's kind of an unwritten rule, that your "leathers" (sporran, shoes, belt) should all match (black with black, brown with brown.)

The sporran is probably a bit formal. But, I don't know, I like it fine for day wear. I would probably wear it as day wear myself . I'll also echo the others and say get yourself one (or two) of Cavscouts sporran straps.

Looks good though. That saffron is a great kilt.