This theme is not tested on firmware 21+. After installing, go to Settings → Themes → Basic Dark. I used JSON files from another theme and downloaded images from the internet to put this theme together, so none of the content is originally mine. It’s been tested on firmware versions 19.0.0 and 20.5.0, but I’m not sure how it works on other versions. This is the artist page: https://www.artstation.com/artwork/Q28yZ