The color balance tool modifies the color balance of the active selection or layer. Changes are not drastic. This tool is suitable to correct predominant colors in digital photos.
You can get to the Color balance tool in several ways :
In the the image-menu through:
→ → , or →By clicking the tool icon: in Toolbox, provided that you have installed color tools in Toolbox. For this, go to Tools Dialog.
Selecting one of these options will restrict the range of colors which are changed with the sliders or input boxes for Shadows (darkest pixels), Midtones (medium pixels) and Highlights (brightest pixels).
Sliders and range from the three RGB colors to their complementary colors (CMY). The zero position corresponds to the current level value of pixels in the original image. You can change the pixel color either towards Red or Cyan, Green or Magenta, Blue or Yellow.
This button sets color levels of the selected range back to the zero position (original values).
This option ensures that brightness of the active layer or selection is maintained. The Value of brightest pixels is not changed.
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.