With diluted genes it is about this color with this color. Simply because after all a palomino is a chestnut with a single diluted gene. A perlino is a Chestnut with 2 diluted genes. Therefore if you breed a Double dilute to a non dilute horse the only possibility is a single dilute whether it takes the form of a Buckskin, Palomino, or a Smokey black. Where it gets complicated is predicting which one of those 3 you will get. Now that will be based on her background as well as the studs. However a dilution is guaranteed.