If a horse is QH x QH with enough color it can be considered an APHA registrable paint as well. They are called "Crop outs" in the APHA world. Paints are, Paint x Paint, Paint x QH, QH x QH with color, or Paint x TB. :) My parents bred paints for 20 years ;) Also, as someone else mentioned- Paints can be registered as Pintos because it's more of a color thing, but Pintos are rarely paints!
Proud owner of 13yr old Paint Gelding, Bali! <3