A bull's eye is a term used for the very centre of a target. So if you hit the bull's eye it means you aimed perfectly. 

I haven' heard "in black" before...might be something out of context of a longer sentence...like hitting the bulls eye with your eyes closed. 

Thanks! Oliver!

Yes! Always it is difficultly for song to translate ;)

I think Oliver has a great hypothesis. That part of the song has no substantial understanding. Some musicians especially from Rock, Metal and Rap music tend to invent terms that no one can understand. It's not highly common, but I'd encountered them before.

of course! Emilio.
It's  Cinema Bizarre - "Lovesongs" 

Hey, Reyn. Can you tell me the name of the song and its artist in which it consists that line?