Customize Folder Icon and Color in One Click. Organise your Folders more Easily. Don't you know how to change standard yellow folder to a colourful and bright one? With FolderIco, give some color to Windows folders. With just a one click, colorize your folders, and discover a new intuitive way to classify your files. A quick look is now enough to identify the folder you are looking for. Classify your Folders by Priority. You can now classify your folders by priority. Red is an important folder, orange is urgent, green is no action needed. Choose the attributes that you like, so you'll never delete an important folder in error.