Separating out Hue, Saturation and Luminosity Layers in Affinity Photo

Sometimes it would be really helpful to be able to edit Hue, Saturation and Luminosity into separate layers where the full power of Affinity Photo may be applied to these separately.


Here, I reveal the complete set of equations and how to simply type them in to create separate HSL layers. Note that this may not be the same calculation as others use, but it is unique in the way the layers can be recombined into the original image, so you can then edit each separately.

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