jaime, you did not understand, those are the "socks"
Ahh I see, I admit, my mistake. Without seeing Pain's footwear, I had forgotten that Akatsuki members used some kind of sock like clothing for that part of their legs. They usually have their bare toe's sticking out of their boots, like Naruto does, so they're not exactly socks by western definition, but they do have some type of material, that covers up that area of their legs. Lets just call the footwear, or shoes that they wear, "ninja boots."
I actually just looked at a different image of all 6 of Pain's bodies, that showed their ninja boots very clearly, and the part of the boots were discussing about, are the upper part of the boots. The image I'm refering to, is the doublespread from chapter 379. I think that part of his ninjaboots it's supposed to be colored either white, or gray. Well anyways, I'm sorry about that Madara, my bad. I just thought that the shade of yellow you used for the upper part of his ninja boots, kind of looked like flesh, so in my mind I was thinking it was his leg. If you take a look at chapter 379's doublespread, you can get a good look, at what Pain's ninja boots look like. I'd make the link, but it's really late in my part of the world, so you'll just have to take my word for it, or go to onemanga.com, and take a look at them for yourself. Well, now that I'm seeing everything clearly, my only criticsm for you, is that Pain's eyes would of looked better, if they weren't the same color as the background. The color you used works well for his eyes, but not neccesarily if the background is the same color. Most colorists have been coloring his eyes a light gray, which I think is the most accurate color for them, keep up the good work.