Why wouldn a horse breeder mate male and female palominos to get palomino colts?
If you mate a palomino stallion with a palomino mare, your change for a palomino foal is ONLY 50%, for a cremello foal 25%, and for a chestnut foal 25%.
if you want to guarantee palomino offspring you have to mate a chestnut to a cremello which will ALWAYS result in a guaranteed palomino colored foal.
The shade of palomino (How light or dark the palomino foal will become), only time can tell – but most palominos in summer have a dark golden coat.
Of course, just randomly crossing chestnut mares with cremello stallions does not mean you will always get a stunning golden beauty. The mares and stallions should be carefully matched – if you choose horses that are incompatible in temperament or conformation, you might get a palomino foal that is ugly or belligerent. Colour should not be the first consideration when making breeding choices. Even when you do cross chestnut with cremello (guaranteeing yourself palomino) there is no way to know the quality of the coat colour until the foal is born – you could still end up with a palomino that is too light, too dark, or has a blonde mane and tail rather than true white. So it’s best to choose from lines that are known to throw good palominos – or take the 50/50 risk breeding two palominos together.