Why is my penis a darker colour?

Perhaps you are of Hispanic, Italian or Greek descent?

I've seen that in some gym showers.  I never took notes but as I remember, I've seen it more often on SE Asians and Pacific Islanders.  It seems like I've seen that on some light-skinned black men and some Mex and South American men.  (After you 'd seen a lot of men in the showers, none of them look special, so I'm not certain I'm right on all of that).  After writing this out, it seems right now that I don't remember seeing men who look "purely" Euro with dark dix.  

Dip it in white paint and it will become normal

It means you have a "choco" dick, where its a darker color that your skin tone

well thats a common sympton of circumsicion, you see how it works is as you become older your penis will become gradually darker and the fall off. But it isnt too late, you can still go see a doctor

tis normal man 

The skin of the genitals is normally more deeply pigmented than the rest of the body.

Be thankful that you have an intact penis.

https://www.doctorsopposingcircumcision.org/wp-con...

With your darker colour, If you had been circumcised, you would have a pronounced colour change at the scar and a two-tone penis.

http://en.intactiwiki.org/index.php/Circumcision_s...

Wear sunglasses , or don't look at it .

it is normal for the penis to be darker than the rest of the body due to all the melanin. foreskin status has nothing to do with it