Simple program that patches the Stickies.app binary to change default sticky note colors.
It works on my machine, but it may not work on your machine. Or with your version of the Stickies.app.
I tested it on OS X 10.12.1, with Stickies.app Version 10.0 (1000).
I am not responsible for any damage this code may cause on your machine.
If you decide to use it - make a backup copy.
Stickies.app is part of OS X distribution. It means that there us no way you can modify, rename, or delete the app.
I recommend to make a copy of the app, call it
Modern Stickies.app, and then
Open the Modern Stickies.app and voilà:
The code is distributed under MIT license. See LICENSE.md for more details.