I like the color combo. Good proportions and nicely tied tag and wing.
The spey hackle seems a bit too dense though. If you strip one side of it the fly would ballance better and be more spey-like.
I would also add a black face or throat hackle to the fly to ballance the blue. This could either be a spey feather or black dyed mallard (my favorite for colored face hackles). In fact, a natural guinea feather as a face hackle would ballance the grizzly wing and make the fly look of a whole.