try experimenting with an off center light, or directly overhead, even under lit for scary effect (clowns = scary)
basically anything other than this front lit source which creates "pillow shading" and will make some cry.
personally i feel i have been wrestling with some things about color.
i found "hue shifting" to be interesting and helpful.
i think i like the flesh tones you picked, but you could probably go with more drastically shifted ramps overall.
