Hello!
The skin looks pretty good!

Though, with the shading, there would be a few improvements I would make:
1. Use Dimensional lighting
  I feel like the cape did miss a few opportunities with lighting techniques. To make the color design feel less flat, hue-shiting towards magenta hues would be good for the shadows. Additionally, brighter highlights (with a slight orange hue) on the cape's non-darkened parts would help balance this change.
  Other shadows would be treated similarly to get the most effect out of the recolor.
2. Correct the pants.
  Correctly the pants on the skin are drawn at an angle while the reference does not draw this.