Alright so I know absoloutly no coat terminology. I was just curious as to what Dukes coat will look like when he is older

ex: lighter, darker...
He is not a purebred GSD and his mother (pure Gsd) had a saddle kind of coloring... But that's all I know. He's a really sweet puppy and It doesn't matter to me what he ends up looking like, I'm just curious.
Thanks!