System Color Picker is a macOS color picker with many features.

Features:
Quickly copy, paste, and convert colors in Hex, HSL, and RGB format
Show as a normal app or in the menu bar
Toggle it from anywhere with a global keyboard shortcut
Make the window stay on top of all other windows
Launch it at the login

The built-in color picker supports plugins:
Scala Color
Pro Picker
Material Design
Color Picker Plus

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