I think it is fascinating watching poodles change color. My black has stayed black but now has white hairs sporadically, most notable in his tail. Some refer to this as a "bad black" - though he never could be bad - LOL. He is 5 yr.old.
Your baby is turning blue. Poppy began turning blue at about 2 yrs and mostly finished by 3 yrs. Her tail, lower legs and parts of her ears are still mostly black. Silvers turn very very early, blues take much longer. It is a fascinating process.