Fonda I just purchased one that I had painted brown. You can choose any Benjamin Moore color for the exterior with Maidstone. Go to maidstonesupply.com
If you are lucky enough to own a claw-foot tub, make it the focal point of the room by giving the outside a coat of color, maybe chalky blue for a classic, serene look or soft petal pink for a romantic choice. If you plan to remodel your bathroom anytime soon, you may be able to hunt down a vintage claw-foot tub (try searching online for "salvage yard" plus your city for good sources) with a less-than-perfect finish and spruce it up with your choice of color.