Adaptive Backgrounds - Extract dominant colours from images
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!
ColorFavs - Generate color palettes from images, urls or randomly
Pandacolors - One click color generator with real time preview
Color Palette Generator - Enter the URL of an image and find its color palette
Cool Backgrounds - Create fast, one-of-a-kind hero images for blogs & websites