Site Palette - Get the essential colours from any website
Sketch Palettes - Sketch plugin to save and load colors into the color picker
Colorion - Curated color palettes with search and tags support
UI Colors - UI Colors is a tool to create, edit, preview, export and save Tailwind CSS colors.
Harmony: Accessible UI Color Palette - Elevating UI contrast control to a new level of precision
Color Palette Generator - Enter the URL of an image and find its color palette