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Red | H: Shifts red hues. Magenta ← 0 → Yellow
Red | S: Saturation control for red hues.
Red | L: Density adjustment for red hues.
Yellow | H: Shifts yellow hues. Red ← 0 → Green
Yellow | S: Saturation control for yellow hues.
Yellow | L: Density adjustment for yellow hues.
Green | H: Shifts green hues. Yellow ← 0 → Cyan
Green | S: Saturation control for green hues.
Green | L: Density adjustment for green hues.
Cyan | H: Shifts cyan hues. Green ← 0 → Blue
Cyan | S: Saturation control for cyan hues.
Cyan | L: Density adjustment for cyan hues.
Blue | H: Shifts blue hues. Cyan ← 0 → Magenta
Blue | S : Saturation control for blue hues.
Blue | L: Density adjustment for blue hues.
Magenta | H: Shifts magenta hues. Blue ← 0 → Red
Magenta | S: Saturation control for magenta hues.
Magenta | L: Density adjustment for magenta hues.
Sat Key: Modulates the effect in either low sat or high sat regions.
Luma Key: Limits the effect to shadows or highlights
Show Curve: Overlays the adjustment curve on the image.
Highlight Key: Displays the isolated key over a checkerboard to preview the affected area.
Switch Order: Changes the processing order of hue adjustments. Recommended when reducing overall saturation.
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Whilst I made and tested this tool within a DaVinci Wide Gamut Intermediate pipeline, there’s nothing within the coding that forces it to be used in any particular colour space—since it simply shifts from RGB (which your images are in natively) to another colour model, applies the adjustments, and then returns back to RGB.