Slacker is a theme for Vencord/BetterDiscord based on the 2023 Slack redesign on macOS.
I quickly made this theme in an evening for me because I like Slack's redesign. The goal of this theme isn't to be a complete redesign but rather to grab the few elements of Slack's redesign I like (use of vibrancy/shadows) and apply theme to Discord. There's probably a way to adapt this for Windows but I don't use it enough to justify spending time porting it there.
If you run into issues, feel free to let me know.
Grab the slacker.theme.css
file from this repo and put it in your themes folder. I might publish it on BetterDiscord when this theme is more fleshed out.