Silver? Haha paints have so many different names even the slightest variations. It could be gunmetal, it could be hyper silver. If you are looking for a new colour I think the best thing to do is go to a local body shop supply and look at paint chip samples. Then you can get an idea of names and a broader range of colours 
 
 
I don't know what its called but Porsche has a simular color, Seal gray metallic I believe it is
 
 
thats a nice car,  i would take that picture to a bodyskop and see if they can blend it to work.