Match doesn't have to mean match. If wearing a full suit or a more formal outfit, the leather or suede of the belt should match in color and sheen to the shoe, or as close as you can get. If wearing a more casual suit or outfit—with something like a Jack Purcell—try a neutral leather, canvas, or mixed-material woven belt for a cool look without trying to be too "matchy-matchy." Adding a bag, some gloves, or a hat? When in doubt, keep tones together (various shades of brown leather, but no black, or various blacks and grays, no browns).