I finally upgraded the last room in my house, and to celebrate, I recolored the shutters.
The shutters on the outside of the house are now slate blue.
Feel free to combine this mod with recolors of the surrounding rooms, if such become available.
The necessary files are zipped; you'll need to unzip them before you install them. You can find installation instructions in the enclosed README file or in LadyCFII's useful post
here.