All the folks on this page have turned their braintanned skins into unique personal clothing. They weren’t trying to make clothes of any specific ‘period’, just functional garb that’s fun to wear (though most of these folks have a ‘primitive’ twist).
You’ll also notice that many folks’s buckskins are of a greyish-tan hue. This is the natural result of years of wearing and washing buckskins in rugged outdoor situations. In the old days it was a sign of someone who’d spent a lot of time in the backwoods.