I've got almost black hair and it has been great. What I recommend doing is applying the dry shampoo at night and then sleeping with it on your hair. It'll look grey/white at night, but by the time I wake up it's always completely absorbed in and my hair looks fresh and clean!
I have dark hair, almost black, and I never have any problems with it leaves flakes or residue. Just massage into your scalp, if you want even more volume, hit it quickly with the blowdryer. You only need to use a tiny bit also!