Take a look at the color picker.  You can choose to set the colors by using RGB and setting the values between 0-255.  Or you can choose the HSV.  H ranges between 0-239, S between 0-240 and V between 0-120.  To truly just get color tint you should only change the H value between 0-239.  You probably should take the output of the color chip and put it through a HVS separator and just take the H value.

This is part of the basis for my expandable color ramp.  To get the range of color shift that you find in Blender's color ramp you have to use the HVS combiner and separator.  

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13