But if you insist on asking me the answer is "where are you and what time is it?"
The color of everything is affected by where it is and what kind of light it's under. For some reason people can accept that with regards to any object in the world except skin. They think there's got to be a formula for painting skin that will be the same anytime anywhere. Well there's not. She's in a green and lavender room so she gets green and lavender skin.
Simple as that.
It's not about blending colors on the pallet it's about laying different colors side by side on the figure and blending them together with a soft brush. This is virtually impossible with acrylics but easy to do with oils.