Bear's of the grizzly "genus"? can range from almost blonde to very dark brown, even black(ish). I have seen 2 black/brown grizzlies, both females with cubs.
Compared to black bears, coloured from white (Kermodi) to black & everything in between, the grizzly "genus" has long claws, curved at the ends & up to about 4"- 5" long. The black bears have very short, tightly curved claws, up to 1 1/2" long or so.