4. Adjust the color balance.

After correcting the tonal range, you can adjust the image's color balance to remove unwanted color casts or to correct oversaturated or undersaturated colors. Examine your image with reference to the color wheel to determine which color adjustments you need to make. (See About the color wheel.) You can choose from the following color adjustment methods:

• (Photoshop) The Auto Color command automatically corrects the color balance in an image. For more information, see Using the Auto Color command (Photoshop).
• (Photoshop) The Color Balance command changes the overall mixture of colors in an image. For more information, see Using the Color Balance command (Photoshop).
• The Hue/Saturation command adjusts the hue, saturation, and lightness values of the entire image or of individual color components. (See Using the Hue/Saturation command.)
• (Photoshop) The Replace Color command replaces specified colors in an image with new color values. See Using the Replace Color command (Photoshop).
• (Photoshop) The Selective Color command is a high-end color-correction method that adjusts the amount of process colors in individual color components. For more information, see Using the Selective Color command (Photoshop).
• The Levels dialog box lets you adjust color balance by setting the pixel distribution for individual color channels. In Photoshop, you can also use the Curves dialog box to make these adjustments. For more information, see Using Levels to adjust color (Photoshop) and Using the Curves dialog box (Photoshop).
• (Photoshop) The technique of blending colors from different channels can also produce color adjustments. For more information, see Mixing color channels (Photoshop).

(Photoshop) To best preserve the original detail in your image as you make color adjustments, convert the image to 16 bits per channel. (See Converting between bit depths.) When you finish making color adjustments, convert it back to an 8-bit-per-channel image.