iWantHue - Colors for data scientists. Generate and refine palettes of optimally distinct colors.
Color Palette Generator - Enter the URL of an image and find its color palette
COLOURlovers - COLOURlovers is a creative community where people from around the world create and share colors, palettes and patterns, discuss the latest trends and explore colorful articles... All in the spirit of love
Palette Ninja - Create harmonious color schemes
Adobe Color CC - Generates color themes that can inspire any project.
Nansen - Blockchain analytics platform to identify rare opportunities