May I suggest using the CombineRGB node plugged into the SubSurface Radius to control the tinting on the skin shader.  It's easier to input your values rather than typing a string of numbers.  

I also use it independently to check the color that the node is imparting so I get an idea of how the SSS is responding.  Below is an image showing the actual color being given in the shader arrangement above.

It's convenient to actually see what you're inputting rather than doing a trial-and-error guess of your radius values.