Attached Link: http://ockhamsbungalow.com/Python/LightPanel5.zip

You might try my NewLightPanel python script. It's meant to set lights in various ways, but it also shows the actual color resulting from the numbers in Poser form. (That is, numbers from 0.0 to 1.0, as opposed to the usual color picker with 0 to 256.) For this use, without actually changing any lights, you can just hit Cancel after choosing the color.

My python page
My ShareCG freebies