Some users wanted the app to include a few other themes so they can choose a different theme for the app. This is also important for devices that do not support Material You as this will be the only way to change the colors used.
Now I could just generate some random themes myself but I thought maybe it would be fun to involve the community.
You can use the link above to create a theme. Once you are done, you can either paste the colors codes you used for the theme or click Export > Android Views and download the zip file it generated. Then, you can share the zip file with a file sharing service of your choice.
If I don't end up with that many submission I will add some myself (be warned, I have sht taste :D)