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Chapter 8. Understanding Colors and Chan... > Working with the Channels Palette

Working with the Channels Palette

The Channels palette is Photoshop's storage locker for color and selection information. For example, when you open an RGB image, the Channels palette displays color channels of red, green, and blue. When you open a CMYK image, the color channels are cyan, magenta, yellow, and black. These primary color channels are defined as the native color channels of the image. The Channels palette can also contain spot-color channels and selection masks. In addition, to color information and selection masks, the Channels palette contains a composite channel. The composite, when selected, lets you view the full-color image in the document window. Selecting any of the individual native color channels changes the active view of the image to display the selected color channel. The Channels palette stores color information using shades of gray, and each color channel is capable of displaying 256 steps from black to white. A zero value pixel displays as black, and a 255-value pixel displays as white. The darker the shade of gray, the less of the selected ink color is used to create the visible colors within the image.


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