Because I like the colors of the new crunchyroll site.
The theme has no image due to copyright. You can set one in the theme editor. I use the 2nd image from here: https://www.crunchyroll.com/de/anime-news/2020/05/07/let-hime-spice-up-your-virtual-backgrounds-with-some-free-wallpapers
A version with black background: https://themes.vivaldi.net/themes/ayRlXaDv0MG