Yeah i believe it's apart of the set. I asked her if she can use a darker brown for the belt.
That's a great piece for $30.
But sourcing two different pleathers for the belt/holster combo might make too much work for her. The belt should be a dark espresso brown, while the holster and whip-keeper should be more warm brown/reddish/golden brown. The holster's going to require people weathering it to get the right color. If you go too dark on the holster it might be too difficult to lighten it and warm it up later. Maybe she can just get darker pleather for the belt itself?