Adjust > Red / Green / Blue / Alpha
Red / Green / Blue / Alpha
The Red / Green / Blue / Alpha filter allows you to adjust the amount of red, green, and blue in the image and to make color corrections by changing the overall color cast. To reduce the amount of a color in the image, you can either increase its opposite color on the color wheel or reduce the amount of adjacent colors on the color wheel. For example, to color correct an image containing too much yellow, either increase the amount of blue or decrease the amount of red and green.
1. Do one of the following:
 Choose Adjust > Red / Green / Blue / Alpha
 Click the Red / Green / Blue / Alpha button on the toolbar
2. Use the following options:
 Red (%)
Select the percentage to change this value. A value of 0% indicates the original value. To add more of a color, use a positive number. To remove some of a color, use a negative number.

Min = -100, Max = 100, Default = 0.
 Green (%)
Select the percentage to change this value. A value of 0% indicates the original value. To add more of a color, use a positive number. To remove some of a color, use a negative number.

Min = -100, Max = 100, Default = 0.
 Blue (%)
Select the percentage to change this value. A value of 0% indicates the original value. To add more of a color, use a positive number. To remove some of a color, use a negative number.

Min = -100, Max = 100, Default = 0.
 Alpha (%)
Select the percentage to change the alpha channel. A larger alpha value means more opaque or less transparent. A value of 0% indicates the original value. To make the image less transparent, use a positive number. To make the image more transparent, use a negative number.

Min = -100, Max = 100, Default = 0.
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Related Information
Effects > Special Effects > Blueprint
Adjust > Colorize > Green
Adjust > Colorize > Blue
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