The most common color associated with this gene is Silver Dapple. These are black horses (E? aa) with at least one dominant copy of silver (ZZ or Zz). The silver gene only affects black pigment, so this gene can easily hide on a red horse, like Agouti can. It will have an effect on a bay horse, and often silver bays are mistaken for chestnuts. Like with all other genes, you can of course stack these up, resulting in colors like Silver Amber Champagne Dun (or E? A? crcr Ch? D? Z?).