match.color.io - Automatically match colors of any image or movie with ML
Color Palette Generator - Enter the URL of an image and find its color palette
Colores - Find color palette ideas via image search
Swatches - A fun and accurate color picker for the real world
Image Colour Transfer - A free-to-use browser-based application that allows an image to be recoloured to match the colours of another image using novel methods.
Cone - A delightful and easy to use color picker for the real world