The Selective Color adjustment allows you to change the selected color in an image without affecting other colors.
Select Image -> Adjustment -> Selective Color... to display the adjustment parameters in the Settings Panel.
You can also use the Selective Color adjustment layer (Layers -> New -> Adjustment Layer -> Selective Color...) that will affect all the underlying layers without changing their content.
Range. In the drop-down list, select the color/tone range to be adjusted.
Color Components (-100..100). The Cyan, Magenta, Yellow, Black values allow you to change the amount of the selected color within the specified range.
Relative. When the check-box is enabled, the parameters change the amount of cyan, magenta, yellow, or black depending on its percentage in the selected color. When it's disabled, the color is modified in absolute values.
Fixed Preview Area. If the check-box is enabled, all changes will be displayed in a small preview area indicated by the dotted line. If the check-box is disabled, the changes will be applied to the area visible in the Image Window.
Click Default to restore the default values.
Click OK to apply all changes and close the dialog box.
Click Cancel to close the dialog box without applying any changes.