Linia - You will never look at colors the same way...
Color Hunt - Curated collection of beautiful colors, updated daily
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.
Material Palette - Generate and export your Material Design color palette
match.color.io - Automatically match colors of any image or movie with ML
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!