Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.
ColorZilla - ColorZilla is an extension for Mozilla Firefox and the Mozilla Suite.
ColorMania - Colormania is an advanced color picker utility, especially created
Colors & Fonts - Css gradients, color palettes & font pairing 1 click 1 place
Paletter - Easiest way to create professional color palettes
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!