The Adjust Saturation filter
You can use the Adjust Saturation filter to adjust the color saturation and lightness of your images. This filter can help compensate for a lack of color definition.
Ink-jet printers can over-saturate color, making the colors look unrealistic.
To adjust saturation
Select an image file.
On the Window menu, click Image Editor.
Click the Adjust Saturation filter.
In the Adjust Saturation dialog box, drag the Saturation slider to define the intensity of the colors. The existing level of colors in an image is 100. To reduce color saturation, drag the slider to a number less than 100. Zero represents no color, which makes an image black and white. Drag the Lightness slider to brighten or darken the image.