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  • 1 year later...

Believe it or not, any colour can be expressed using adjustments from yellow to blue and green to magenta (near enough to red), plus a chanel for lightness. You may have heard of this in Photoshop, where it is called LAB - lightness, a and b, where a and b are the yellow/blue and green/magenta channels. This is how white balance adjustments work. Remember, if you reduce yellow you increase blue and if you reduce green you increase red (strictly speaking, magenta).

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