A double rainbow arcs majestically across a misty landscape, rendered in soft greens and golds with a slate blue sky that frames the phenomenon. The composition balances a dark forested foreground against distant mountains, capturing both the scientific precision and the romantic wonder of atmospheric optics in this 19th-century French educational illustration. Printed to order on a soft, absorbent mat with a no-slip backing, ready underfoot the moment you step out. The kind of art you don't expect on a bathroom floor.