Quickly Remove Common Color Casts

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Photographs that are scanned or brought into Photoshop using a digital camera often take on unwanted color casts. Alternatively, certain lighting effects can cause a color cast—commonly yellow or blue, but can be any color—to occur right when the picture is taken. Photoshop contains many ways to neutralize those color casts, but the quickest way, if you're not concerned about being too precise, is to use the Auto Color command.

TRY IT Open a photo that contains a color cast in Photoshop. Choose Image I Adjustments I

Auto Color, or press CTRL-SHIFT-B (Windows) or CMD-SHIFT-B (Mac) to run the Auto Color command.

There are no specific options for this command; Photoshop automatically adjusts the color by neutralizing the midtones and clipping the black and white points to eliminate any extremes in either the dark or light parts of the image. The amount to which it clips those points can be adjusted in the

Auto Color Corrections Options dialog box. To access that dialog box, choose Image I Adjustments I Levels and click Options.

Select to adjust all channels in the same way; used by Auto Contrast command

Select to adjust each channel individually, as needed

Select to adjust according to -

the lightest and darkest pixels in the image (maximizes contrast)

Select the closest almost neutral point in the image and force it to be neutral

Select to save your options as the default for performing color correction in Photoshop

Select to adjust all channels in the same way; used by Auto Contrast command

Select to adjust each channel individually, as needed

Select to adjust according to -

the lightest and darkest pixels in the image (maximizes contrast)

Select the closest almost neutral point in the image and force it to be neutral

Click to set the target value for the neutral areas of the image

Click to set the target value for the neutral areas of the image

Click to set the target value for the lightest areas of the image; Clip value specifies which portion of the extreme lights to ignore in order to get a good color sample

Click to set the target value for the darkest areas of the image; Clip value specifies which extreme darks of an image to ignore in order to get a good color sample

If you make changes to anything in the Auto Color Corrections Options box that you want to be used by the Auto Color commands, select Save As Defaults and click OK. These settings are also used by the following commands: Levels, Curves, Auto Level, and Auto Contrast.

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