I have kind of a dark ring around the end of my dick just behind the head. It's not real dark, but noticeable, and seems darker as the years pass. When I was circumcised, they did not cut a lot off, I don't know, maybe that's why the dark ring is there. As one of my drs. once remarked, they did a nice job on you. I have lots of free skin on my dick even when extremely hard. The rest of it is pink/white, and I think a little darker than in my youth. Maybe it's where I've stuck it so many times over the years that it got a bit brown! LOL
What I've noticed are some black-like dots of sorts on my balls, like moles, but they're not. I was concerned when these first started appearing, but from what I've read it's pretty normal for some men in later life.