[Solved] Spawn Horses with "Colors"

I'm spawning horses in game using something like:

entityX1 = new EntityHorse(world);
Stuff.setEntityPos(entityX1, pos.getX(), pos.getY(), pos.getZ());
world.spawnEntityInWorld(entityX1);

Problem is that they always spawn as White horses.

What do I need to set on them so they can spawn with random colors?

PS: I noticed the setHorseTexturePaths on the Horses, but that is private.