Color Hunter - Color Hunter is a place to find and make color palettes created from images.
Adobe Color CC - Generates color themes that can inspire any project.
iWantHue - Colors for data scientists. Generate and refine palettes of optimally distinct colors.
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
Image Color Summarizer - The web service provides statistics describing color characteristics of an image identified by URL.
Color hexa - Color hex encyclopedia providing information about any color.