Lightness is technically the same as brightness. The Hue, Saturation, Brightness (HSB) color model uses these terms to define a color, as opposed to the RGB and CMYK models, which define it as percentages of the component primaries. These primaries, of course, are red, green, and blue for RGB, and cyan, magenta, yellow, and black for the CMYK model.
Instead of selecting Master from the pop-up menu, if you select a color, the dialog box changes slightly, as you can see in Figure 5.11. The Eyedroppers are now active, enabling you to select colors from the image, and adjustable range sliders are centered on the color you have chosen to adjust. You can move these back and forth to focus on as broad or narrow a range within that color as you want. This might not seem like a big deal, but it's really very powerful, especially if you want to create a pink tiger, or maybe a blue one.
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