folder-colorizer

Install command: 
brew install --cask folder-colorizer

Name: Folder Colorizer

Folder icon editor and manager

https://softorino.com/folder-colorizer-mac/

Cask JSON API: /api/cask/folder-colorizer.json

Cask code: folder-colorizer.rb on GitHub

Current version: 4.11.7

Current version requires: macOS >= 10.11

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