I was wondering if there is any significance in a horse having a split colored tail. Like a palomino pinto with a white tail that has black in the center?
I do know palominos usually have black hairs in the tail at the center, but palomino pinto wouldn't increase the amount of black hairs in a palomino pinto tail, where it's basically just a palomino with pinto pattern to add white areas.
You can google palomino and black hairs, tail and mane if you want. I think Palomino registry here in the States sets a limit to the number of black hairs for the shows that mostly quarter horse people attend (any minis? I don't honestly know if they now accept minis for registration...). I know that paperwotk and rules don't alter color genetics. It is normal to have black hairs in the tail of a true palomino. We have a range of the color spectrum of true palomino minis here, from light to very golden, and every one of them has black hairs in the center / core of their tails
Not all palominos have black in the tail; from what I have seen, minis tend to have more than the full size horses--I've seen Morgans who had snow white tails with few or no dark hairs.
The palomino registries do limit the amount of black that is allowed in the mane and tail. The Canadian Palomino association allows no more than 15% dark hair in the tail. Ponies and miniatures are not accepted for palomino registration.