I would go for the black... that was my 1st choice and the ONLY reason i didn't get black was because the car i just sold was black, and i wanted a change.. or silver if you want a car that will not show scratches and looks pretty awesome.. look at Jaspers for instance.. As for vitality blue like mine, yeah its a lovely colour but its just not black and you may regret it...
BUT its your choice and only you can really decide something like that...
Scilla red looks good on the Abarth too..lovely colour to clean..