Maserati Blu Nettuno paint code

[yeti]

Maser 4200 owners - I need to have a little bit of the car painted (the plug that covers the washers for the Xenons) and need to order a can of spray paint.

It's a 2002 Maserati 4200GT in Blu Nettuno, but there are apparently 2 diferent Nettunos, code 656 and 670. Anyone know which is the right one for the car of this age? It's a metallic too if that helps... I am away from the car so can't check myself, but need this code to order the right paint!

Help!