ColorPicker is a free utility application that makes the Apple Color Picker available anywhere - any time. More importantly, ColorPicker allows the colors panel to stay visible, floating above all open windows, regardless of what applications and windows you have open.
ColorPicker can be run as a normal application in the Dock or as a menu bar application, switchable via the preferences window -- the choice is yours.
The Apple Color Picker has always been a great tool, but until now, never seemed to be available when you need it most. Now, capturing those colors you need is only a click away. Plus, you can easily extend the color picker with some great third-party plugins.