Download the macOS extension now:
https://pastre.github.io/harmonify/index.html

Harmonify is a service that detects colors directly from your camera and automatically generates a palette based on that color, or save the color itself.
It contains 4 pre-made palettes: Monochromatic, Analog, Complementary and Triads.
Color palettes appear on the macOS application, allowing for the best reachability and integration with tools like Sketch, Illustrator and xCode
When saved, color palettes and colors can be shared using text, or exported to a .sketchpallete file, that is readable via sketch.
Harmonify also displays color details, as hex code, red, green or blue . intensities, and is perfect for anyone trying to build palettes