Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.
0to255 - 0to255 is a simple tool that helps people find variations of any color.
Sip - A better way to collect, organize & share your colors.
ColorMania - Colormania is an advanced color picker utility, especially created
Instant Eyedropper - Identifying the color code of an object on the screen is usually an involved, multistep process:...
ColorZilla - ColorZilla is an extension for Mozilla Firefox and the Mozilla Suite.