Originally Posted by Poseidon
It would be a pinto, not a Paint. A Paint is a breed. Pinto is a colour pattern. A TB wouldn't be purebred if it were registered with the APHA. I'm assuming it could probably be registered as a pinto somewhere, but it wouldn't be with the APHA.
Actually this is not true. Paint & Pinto are both breeds now & have registries.
A Paint is a horse of either QH or TB breeding NOTHING else, which means yes, a TB can be a registered paint so long as it displays the correct markings or its parents did.
A Pinto is a white&color patterned horse that is of any breeding but purebred QH or TB. A mix would be called a pinto because the paint breeding standard is so restricted, as well as any drafts, warmbloods, arabs & ponies, etc.
There are pattern variations, but these are classified as Tobiano, Overo & Tovero.