A Color Picker is an application, usually found within graphics software and online, used for the purposes of color management, creating color schemes, picking colors, and more.
1.Just Color Picker
Absolutely free colour picker and colour editing tool features five formats of colour codes (HTML, RGB, HEX, HSB/HSV and HSL), 3x/9x/15x magnifier, picked colour history, gradients, RGB and RYB colour wheels, harmonious colour finders, RGB and HSV colour
A free multi-purpose color picker.
Pixeur is a small tool that allows you to grab colors from anywhere on your screen and then copy the color code to the clipboard.
ColorMania is a extended colorpicker with an eyedropper component and a screen Magnifier. ColorMania lets you easyly select and modify colors. It's the ideal tool for website and application developers. The latest version has undo/redo functionality.