ColorHunt
Color Hunt is a free and open platform for color inspiration with thousands of trendy hand-picked color palettes.
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Coolors
The super fast color schemes generator! The Coolors app allows you to create, save and share perfect color palettes in seconds!
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Adobe Color
A very useful free color wheel and color palette generator for designers and developers. You can also upload an image to get colors from it.
Dribbble Color
Dribbble Color is a wonderful tool that allows you to display all dribbble shots, based on certain colors.