I am gradually adding warm tones to her face along with shadow work with blues, gray and brown around her eyes. A gray or black fur is best started with blue for me adding small amounts of black or purple for different tones. Reds also help and my favorite combo to use is greens and red mixes instead of black. It seems to be a better darker color. On the background, I am trying out some brown tones on the branches but am getting an uneasy feeling about how distracting it is from focus on her face.