Yeah the holster itself is fine, the color just seems pretty mismatched (and ugly af). lol I'm guessing it's supposed to be his leftover gear during his pre-RE4 recruitment days.I believe that type of holster tends to be more comfortable than the other type of drop leg holsters. The gun stays more secured as well.
Still, he could have spray painted it black or something at least. The thing looks like it's got mold on it.