Adding Color with Photo Filters in Photoshop

Last but not least in the group of new adjustments offered by Photoshop CS is the Photo Filter command. Photographers will appreciate this digital adjustment that is reminiscent of the analog method of placing a colored filter in front of a camera lens to tweak the color balance and color temperature of the light coming through the lens. This is a great way to make an image appear cooler or warmer. Have a portrait where your subject appears a little too bluish? Apply a Warming filter and bring some rosiness back into his or her cheeks. You can also apply a colored filter to add a tint of color to your image. To apply the Photo Filter adjustment, follow these steps:
1. Open your image and choose Image-->Adjustments-->Photo Filter to apply the filter to the entire image.
If you want to apply the filter to one or more layers, choose Layer-->New Adjustment Layer-->Photo Filter.
2. Make sure you have the Preview option selected so you can view the results.
3. In the dialog box select the Filter radio button to choose a preset filter from the Filter pop-up menu, or select the Color radio button to select a custom color for your filter.
If you opt for the custom color, click the swatch to choose a color from the picker.
4. Select the Preserve Luminosity check box if you don’t want the filter to darken your image. Note that some photo pros advocate not checking this option.
5. Adjust the Density slider to control the amount of color applied to your image.
A higher value provides a stronger adjustment. Use the Density control with restraint. Anything above 50% produces a severe effect.
6. Click OK to apply the adjustment and exit the dialog box.