Hex Color Picker is described as 'puts an extra tab in the system-wide color panel. Instantly see the hex color code for any color, and edit it just the same with a number of shorthands' and is an app in the Photos & Graphics category. There are more than 50 alternatives to Hex Color Picker for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is Just Color Picker, which is free. Other great apps like Hex Color Picker are gpick (Free, Open Source), Instant Eyedropper (Free, Open Source), gcolor2 (Free, Open Source) and ColorZilla (Free).
ColorSlurp is the ultimate color tool for developers and designers. Pick any color on your screen using the high-precision magnifier. Create and edit colors using advanced selection and editing tools. Organize colors into collections.
Visual Color Picker is very easy to use and powerful RGB-HSV-HSL-CMYK-HEX color selector. The program allows you to easily capture color value from any position of the screen even if program does not have input focus. The program has small screen capture preview area.