The color balance tool modifies the color balance of the active selection or layer.
Color Balance Settings
The Color Levels input boxes provide a manual way of selecting the RGB weights. The first box corresponds to the Red level, the second to Green, and the third to Blue.
The three sliders adjust the color balance interactively.
Selecting one of these options will restrict the range of colors that are changed with the sliders or input boxes for Red, Green, and Blue.
This option ensures that the brightness of the active selection or layer is maintained.
The Preview checkbox toggles dynamic image updating. If this option is on, any change made to the RGB levels are immediately seen on the active selection or layer.