The Selective Colour adjustment provides a way to subtly adjust and enhance colours in your image on an individual channel basis. It makes a useful tool for colour balance corrections.
Settings
The following settings can be adjusted:
Colour—determines the colour to be adjusted. Select from the pop-up menu.
Relative—when selected (default), colour is added or subtracted in proportion to the amount of that colour present in the source pixels, giving a more natural effect. If this option is off, colours are added or subtracted based on the absolute percentage specified, regardless of the how much of that colour is present in the image.
The sliders control the levels of the named colour in the selected Colour. Drag the slider to the left to decrease the level of the named colour, drag the slider to the right to increase it.