With Folder Colorizer you may add some personality to your folders (like change color, emoji, patterns etc.)
You may add multiple folders at once or simply color one folder. And by the way, yes — you can always restore folders to their original color.
You need to simply drag’n’drop the folder into Folder Colorizer app, and then choose the desired color, shape, emoji etc.
You may find a video instruction here: https://www.youtube.com/watch?v=Ei4fJPDxeOA