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
Adobe Color CC - Generates color themes that can inspire any project.
Color Hunt - Curated collection of beautiful colors, updated daily
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
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!