Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.
ColorMania - Colormania is an advanced color picker utility, especially created
Colormind.io - A color palette generator powered by deep learning.
Paletter - Easiest way to create professional color palettes
MagicPicker - An advanced color picker for Photoshop & Illustrator 🎨
gpick - A color picker and color scheme creation tool.