I think the color is fairly typical. My husband has very waxy ears. It is absurd how often he uses Qtips and how thickly they are covered with stuff. My son's ears are the same way. I use Qtips myself after every shower to get the water out of my ears (drives me crazy to feel water in them after a shower/shampoo).. and NEVER see ANY color on them. My daughter's ears are like mine. Son is 12, daughter is 9. My son has ALWAYS had an abundance of ear wax, and yes, often it is thicker and darker, almost orange/brown. My daughter... when she has wax... is lighter, oil colored.
I think that probably your son just is going to be a 'high producer', lol. And when it doesn't get softened and wash out (from a warm bath for instance, not from digging with a qtip) it can get thicker and darker.
Please try not to use anything to get it out. You can push it deeper and damage the eardrum. Believe me, I KNOW how tempting it is!! I have a son like that with LOTS of wax!! I can even SEE the little balls/chunks of it sometimes... Ask your doctor how to address this issue for your son. At MY son's age, I use Debrox in his ears. It is drops that you put in and let it sit for a few minutes, then he tips his head and lets it run out. It softens the wax, which also comes out, either then or when he showers.
Added: One additional thought that just occurred to me: Have you noticed any allergies in your son? I only ask b/c it just occurred to me that my husband has cat allergies, and my son has lots of environmental allergies (pollen, dust, mold, etc., but not animals). My daughter and I, who have almost no discernable ear wax, don't. Makes me wonder if there could be a possible connection?