For Cloud hair, it's not just getting the color right that's the problem... you'll need to stick cement in there if you want to keep the spikes up

Since your hair is already dyed black, maybe it'd be better if you tried cosplaying a character that has black hair. How about
Tifa? Vincent? You'd need much longer hair for that, though...
EDIT: It doesn't really match your current hairstyle, but another possibility is Tseng.
Come to think of it, I would've thought you'd have naturally black hair
