Help reading spark plugs

A 3 is on the cold side for plugs. Especially for the street. I think just a hair rich but that might be the cold plug. Like to see a 5. Now what are you all looking at? I'am looking at the metal ring the ground strap is welded to. Looking for a dark grey,not black. Your close. Google "plug reading 101 by Mike Canter". This is to tune for power. Go leaner on the rods for cruising.