Re: Balancing -- Portrait (x-post from figure)
This is a very strong bold statement - from a very difficult angle to capture, I might add. The fairly monochromatic flesh colors work well together and I like the contrast with the background, as well as the small touches where the blue peaks through.
If you are aiming for technical accuracy, there are some small issues - but I'm not sure if that is your goal. One thing that does stand out is the torso - I would try for a bit more variation in skin tone from shoulder to shoulder. In the photo there is some suggestion of the collarbones and a definite variation in value under the collarbones and elsewhere. The blue armpit reads oddly (to me, anyway) as it is the only shadow area done in blue and not in a dark brown.
Again, you may be trying for a very bold effect, but if not, you might try for a bit more transition as your light flesh tones transition into shadow, especially on the chin. There seems to be a definite middle value between the lightest light and the very dark value of the chin line on the photo. Because skin is translucent, there is almost always a scattering of light in the skin itself resulting in smooth transitions from light to shadow.
Again, the overall effect is very strong and effective! Despite my pickiness, this is very nicely done!