Tinter - Generate color variations of images
Site Palette - Get the essential colours from any website
Stencil - Stencil is a the fastest and simplest way to design images and graphics for digital marketing.
Sketch Palettes - Sketch plugin to save and load colors into the color picker
PIXELIXE Studio - Pixelixe makes it easy to create and edit any type of online graphics. For social media, blogs, ads, and more!
Swatches - A fun and accurate color picker for the real world