Use the Hue Map command to replace one or more colors throughout a photograph or other complex image. For example, you can shift all greens to blues.
You can also use the Hue Map command to change the saturation or the lightness of the image. When you adjust these values, all colors (original and shifted colors) are adjusted.
Important: To apply this command to a selection, the image must be a 16 million (24-bit) color image (otherwise the command is applied to the entire image). To increase the color depth of an image, see Increasing the Color Depth of an Image.
To use the Hue Map command:
To limit the correction to a specific area, make a selection in the image. See Using the Selection Tools.
Choose Adjust
> Hue and Saturation > Hue Map.
The Hue Map dialog opens. In the Hue shift
group box, the top row of color boxes shows 10 original colors and the
bottom row of color boxes represents the shifted colors. Each color is
represented in degrees around the 360-degree color wheel.
To reset the colors to their default settings (which is no shift in colors), in the Presets drop-down list choose Default.
For each color that you want to shift, drag its slider to a new color.
To change the saturation of all colors, adjust the Saturation shift value (from -100 to 100). A value of zero represents no change.
To change the lightness of all colors, adjust the Lightness shift value (from -100 to 100). A value of zero represents no change.
Click OK.
Creating Black and White Images