Available colour adjustments include:
Black and White—converts a colour photo to greyscale.
Channel Mixer—adjusts the colour of a photo by modifying individual RGB channels.
Colour Balance—adjusts the contribution of particular colours to a set tonal range.
Gradient Map—uses the lightness value of pixels in a photo to recolour it using a specified gradient.
HSL—shifts the hue, saturation and luminosity values of pixels in a photo.
Lens Filter—emulates the use of a lens filter to tint the colour of the image.
OCIO—(OpenColorIO only) provides source and destination colour space transforms.
Recolour—converts a colour photo to monochrome using a specified tint.
Selective Colour—subtly adjusts the colour of a photo by modifying individual RGB, CMYK and lightness channels.
Split Toning—tints and recolours highlights and shadows.
Threshold—converts any photo into a two-tone, black and white image based on pixel lightness.
Vibrance—adjusts the intensity of subtle colours within a photo.
White Balance—removes undesirable colour casts from a photo by adjusting the 'temperature' of the light.