Ten Ways to Adjust Color in Photoshop Elements 11
Adjust color temperature with photo filters.
Light has its own color temperature. A photo shot in a higher color temperature of light makes an image blue. An image shot in a lower color temperature makes a photo yellow. Photographers sometimes use colored glass filters in front of their camera lenses to adjust the color temperature of the light.
They do this to warm up or cool down their photos or just to add a hint of color for subtle special effects. You can, however, mimic this effect in Elements with the digital versions of these filters.