Summary: The Color Picker in Photoshop is used for a variety of different reasons. At a basic level, it can be used to choose a color, and then then you can paint with that color. Once you become more familiar with how it works, it can be used to match colors, transfer color values from one program to another, for internet use, or otherwise communicate with graphic designers and pressmen. This will be a simple introduction at this point. None of that crazy stuff.
