Here is the little app that will help you. Launch the app and it will be shown on the menubar. Invoke standart mac color picker by one click.
LittlePicker also includes good hex color pane. You pick hex color values from screen or enter hex color value to see result as color on your screen.
Efficient color picker tool designed for Mac.
This program helps you identify and save color codes on your Mac.
Compact and feature-rich OS X color picker that works with a huge variety of formats...
Simple color picker for AppleScript.
Picks HSB, RGB, and HEX colors from various elements and images.