In addition to correcting an image's color, you may want to simply change the colors of parts of an image or even the entire image. There are many ways to accomplish this in Photoshop. It's a good idea to know about a lot of different ways to change color because some methods work much better than others, depending on the content of the image.
The more you know about various ways to change color, and the more you practice the techniques, the better you will become at choosing the best method for a particular color-change task. This can save you lots of time, so it's well worth the effort ...and it's kind of fun, too!
You can target a certain area of an image with an adjustment layer by painting or filling a selection with white, gray, or black on its layer mask. White causes the adjustment to show, gray causes it to partially show, and black hides the adjustment. See Chapter 8 for more about masks. See Chapter 10 for more about making selections.
There may be times when you want to change color for subjective rather than corrective reasons. You can change the color of specific parts of an image, make the overall colors in one image match the overall colors in another image, remove full color and make the entire image consist of different tones of the same color, or change the image so that it's made up of multiple custom colors, such as in a sepia-tone, monotone, duotone, tritone, or quadtone effect. These effects will be discussed in this section, and ...