The easiest method is to put a BrightContrast node between the Albedo/Diffuse node and the HSV node.  I have swapped out the HSV2 node for the actual Cycles HSV for practical reasons, to keep everything Cycles-related.  The settings I use on the BrightContrast node are Bright = 0.2 and Contrast = 0.4.  That should be the right combination, but you can play with the setting values to optimize the skin tone.  Also, I eliminated the Cloud node connected to the HSV saturation and substituted an actual value (0.996).  IMO, the node is not contributing to the shader; the Sky_Color and Cloud_Color channels are too close, yielding a general RGB of 254, 254, 254.  Unless you can demonstrate that a vast difference between the 2 channels can alter the texture's behavior, it would be best to substitute a numeric value instead.