if i were you i would turn the black color to darkred insteed. just like the darkgreen. then it will look like a darkred for the shade of the skin and shade on the glove if you turn it darkred. also when its darkred you could make an outline on the face too. becouse it will look like darkred skinncolor.

Thanks a lot for the links man, i'm gonna read these carefully.

Since you ask, it's pretty jaggy. Also, there shouldn't be outlines on most of the body and none on the head. Black inside outlines are also quite aggressive. I'd suggest colored outlines as you did on the body, with lower contrast for the secondary items, and lower still for inside lines.

Then colors, again. You make separate palettes for each elements, this makes the piece look like a patchwork of separate parts. Try to blend those color ramps around a few common tones, and to reuse colors throughout the parts. Great tuto here. More about color there.