Colormind.io - A color palette generator powered by deep learning.
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.
ColorTag - ColorTag is an API for color detection.
Palette Ninja - Create harmonious color schemes
MulticolorEngine - MulticolorEngine is a color search API for use with an image collection or products.