The 'Red, Green and Blue Increase/Reduce' parameters are the most important settings in the Color module. They directly determine the colour balance in your image. Their operation is intuitive; is there too much red in your image? Then increase the 'Red Bias Reduce' value. Too little red in your image? Reduce the 'Red Bias Reduce' value.
If you would rather operate on these values in terms of Bias Increase, then simply switch the 'Bias Slider Mode' setting to 'Sliders Increase Color Bias'. The values are now represented in terms of relative increases, rather than decreases. Switching between these two modes you can see that, for example, a Red Bias Reduce of 8.00 is the same as a Green and Blue Bias Increase of 8.00. This should make intuitive sense; a relative decrease of red makes blue and green more prevalent and vice versa.
In your final image, noise is worse in some areas, less in others.
The Color module is very powerful - offering capabilities surpassing most other software - yet it is simple to use.
The reason Wipe backs off is that Wipe (as is the case with most modules in StarTools) refuses to clip your data.
Signal bias is a fixed background levels which, contrary to a gradient, affects the whole image evenly.
You can convert everything you see to a format you find convenient. Give it a try!