A color photograph is made from three parts:
• Hue
• Saturation
• Luminosity
Normally, these three parts are in the same layer.
But, the three parts don't have to come from the same layer.
The H-S-L blending modes combine the three parts from different layers.
There are four H-S-L blending modes.
Let's look at one of them in detail, the Color blending mode.
But first, some terms for the layers we'll be using.
The blending layer is the top layer.
It works on the layers below.
The blending layer inspects and makes changes to the layers below.
Base layers are the layers under the blending layer.
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