Color Hunter - Color Hunter is a place to find and make color palettes created from images.
Colormind.io - A color palette generator powered by deep learning.
Palette Ninja - Create harmonious color schemes
Paleta - Extract the dominant colors from any image.
iWantHue - Colors for data scientists. Generate and refine palettes of optimally distinct colors.
Image Color Summarizer - The web service provides statistics describing color characteristics of an image identified by URL.