Color Cast Correction

Adjust the color of the image by selecting the individual channel you wish to affect and moving the midpoint up or down, depending on the color cast you are trying to remove.

Info Palette

Make sure the Info Palette is visible on your screen. If it is not visible, select Window > Info.

Adjusting the Image's Individual Channel Midtones

Go to Layer > New Adjustment Layer > Curves. Make sure the Mode is set to Normal.

Curves Dialog Box Individual Channel Selected

Set the value readout to Ink Percentage. Ensure Preview (eye icon at the bottom) is selected. Move the individual channel's midtone point up to decrease the channel’s color (or increase the complementary color). Move the individual channel's midtone point down to increase the channel's color (or decrease the complementary color). Use the Kenly 3•6•9 Rule. You can check and uncheck the Preview eye icon to see the effects of your midtone adjustment.

Raise or lower the individual channel's midtone point to correct the image's color.

Kenly 3•6•9 Rule

The Kenly 3•6•9 Rule provides guidance for adjustments in Curves. Developed by Eric Kenly, the rule states the following:

An adjustment of 3% is a minor correction.
An adjustment of 6% is a moderate correction.
An adjustment of 9% is a major correction.

Any adjustment greater than 9% suggests that the image should be recaptured.

These percentages apply to both positive and negative ranges. Adjustments of +6% or -6% are both moderate.

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