Well, you never really "KNOW" for sure what they are going to look like - but I can pretty much bet that if you see nothing but silver roots underneath the black, that she is going to be silver - and whether she is going to be a light or dark silver, I have no clue. My Stedman was of course all black, but at 4 months of age, ALOT of his silver started showing through (roots) - and when we had him groomed for the very first time when he turned 5 months months old - I got my baby back, and he wasn't black anymore
He was ALL silver (a darker, steel blue silver color). He is 1 month shy of a year and that is still the color he is today (which I LOVE I might add)
Also, my little guy is in a puppy cut - well his face is anyway. If you want - search my posts and you'll find lots of pics of him - that way you'll get an idea of how his hair is cut
OR - you can always just look at my avatar, lol