black and red with bitch stripe.
For your puppy to be sable, at least ONE parent must be sable (sables down the line don't count - any puppy that inherits the sable colour gene MUST express it, so there is no way that a sable gene can "hide" to re-emerge later down the line.
Sables are brown/grey at birth and go through a lot of colour changes. Black and tans are almost solid black at birth, and gradually loose the black and gain red/tan.
So the proof would puppy pics of Sabo.