There are actually, in terms of human skin colour...
Black black (cant see them in the dark kinda black), black (like the colour of your yearly bath water), chocolate black (the colour of the man that shags your wife while you're out stealing gates and haggling down cars you want to scrap and make a loss on), light chocolate black (the colour of that kid that everyone says looks suspiciously like the black(er) version of you), half cast (not full coloured, like your tv), white black (where they claim to be black but look more white i.e Nicky Minaj)