I agree, take heart, your baby's hair will grow back -- and his color will probably change. My Teddy was white blond on his head and parts of his body with black tips. His white hair looked like it had been dipped in ink. Sorry I don't have any of those pics on this computer. He looked like the lead singer from Kajagoogoo, if you are old enough to know the 80s band.
Teddy's head turned tan/gold by the time he was 2. He still has a lot of blond underneath his dark saddle. You can see some of the blond hair sticking out in this pic -- his saddle looks scraggly in this pic:
Here you can see Teddy's back is lighter than his brother's:
This pic shows Teddy lighter head, but he had already started to darken:
