Generally speaking, the default Ttk theme on any given platform is probably the best one to use on that platform, but looks are subjective and sometimes we might feel that Tkinter gets it wrong. Having a way to adjust the theme might help to smooth out some rough edges and make some users feel more comfortable with the look of the application.
As we've already seen, querying available themes and setting a new theme is fairly simple. Let's create a configuration option to change the theme of our application.
