I like Diesel more but that's just me. I've seen a few silvers named Sterling and I think it a distinguished name. You could also look up some jewelry and cutlery brand names. James Avery is a popular jeweler here in TX, Avery would be cute.
My silver male is called "Ben". His real name is Canams Silver Bently....after the car! One way to look up names is to go to the paint department of Home Depot and look up the gray shades and find a good name. Paints have great names....to bad its just paint.
I have a silver mini boy and his paternal grandfather's name is High-Ho Silver, his maternal grandmother's name is (Silver) Suede. Sometimes we clown around with him and call him "Silverado," though his name is Chagall. Other names for your boy (silly ones) could be Steeley Dan, Ash, Ashton or Grayson. I LOVE the clever idea of looking over paint colors to find name ideas--good one! I'll be using that approach when I next have the chance to name a new poodle in our lives. For now, we think Chagall suits our boy and he absolutely colors our world with joy and laughter!!