wicked i like this 10 from what is see mate great ink (please take a look and rate mine cheers) 1 ting il give you my personal opinion use as little colour as pos. with to much can ruien it but get it right this can be even beter then what is already is :)
No way man, that is a WICKED black and grey tattoo! Coloring it might ruin it! Be careful not to over do something, why fix what definitely isn't broken?