Fine-tune the colours in your image, or even completely change them, by modifying the hue, saturation and luminosity (lightness).
The following settings can be adjusted:
HSV—when checked, uses the Hue Saturation Value (HSV) model instead of Hue Saturation Lightness (HSL). The Saturation Shift and Luminosity Shift sliders behave differently between the two models.
Colour Wheel—when using a particular Channel, allows you to determine the range of colours affected by that channel (e.g., Greens) using four nodes.
Channel—represented as colour nodes under the wheel. Click the first node (Master; multi-coloured) to alter all colours at once or click any other node to enable a specific colour set (e.g., Reds).
Picker—allows you to sample a specific colour from your image on which to base your adjustment. The currently active solid colour node will be updated after picking; the Master node cannot be colour picked.
Hue Shift—controls the colour tint of pixels in the image. Drag the slider to shift the colours through the spectrum.
Saturation Shift—controls the intensity of the colours in the image. Drag the slider to the left to decrease colour intensity, drag to the right to increase it.
Luminosity Shift—controls the overall brightness of the image. Drag the slider to the left to decrease brightness, drag to the right to increase it.