Color Picker Professional is an easy to use color detection tool for developers and designers.
Global configurable shortcut (CMD+SHIFT+C) works from every application.
Quickly get color information for any pixel in the screen.
Add colors to your clipboard with a system wide hot key.
Automatically save previously copied colors.
Works on multiple monitors.
Works on retina displays.
Choose your preferred format for the clipboard (hex,rgb,uicolor,nscolor,..)