How to work with Color Balance
To work with Color Balance
Select the Choose Color tab from the Menu Bar and choose Adjust in the Menu. After that click Color Balance.
In the "Tone balance" panel select which lightness level to adjust.
Select or clear the "Preserve luminosity" check box. Default is selected and luminosity is preserved.
Use the sliders or type values in the three Color levels boxes at the top to set the color balance. When the boxes display 0 and the sliders are in the middle, the image contains its original colors. Increase the amount of one color to decrease the amount of its opposite.
Click OK to close the dialog box and apply the settings.