There are 2 repositories under slack-hacks topic.
A darker, more contrasty, Slack theme.
Lightweight Node.js library for building Slack Block Kit UIs, with a declarative syntax inspired by SwiftUI.
Beautiful dark theme for slack 3, 4+. Apply theme by running one command 🌸
Instructions and resources for modding Slack 4 with a dark theme.
This repository represents a collection of utilities one can use to customize Slack UI in case if the app doesn't provide respective settings.