CaliCastle/slack-dark-theme

(Unofficial) Slack Dark Theme

Theme Preview

Install on macOS

Download darkify-slack.sh from this repo, then open your terminal and enter:

sudo sh /path/to/darkify-slack.sh

Type in your macOS password and hit enter (password won't be shown)

Install on Windows

1. Download and unzip
2. Search for PowerShell and run as administrator and enter Set-ExecutionPolicy Unrestricted and enter Y when prompted
3. Hold down Shift and right click on the darkify-slack.ps1 file (not the .sh file) from your unzipped folder and select Copy as path
4. Go back to PowerShell, paste it and hit enter, then enter R when prompted to run the script then it will execute the installation.
5. Finally, to protect your Windows system, re-enable script protection by entering: Set-ExecutionPolicy Restricted

You're all set

It will automatically install the dark theme into slack for you, once installed successfully, terminal or PowerShell will display the Dark mode has been installed to Slack. message, then you just need restart your Slack app and you can start protecting your eyes from now! Yuussss!

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Behind the Scenes

For Windows, Slack is likely located in C:\Users\username\AppData\Local\slack\app-{version}\resources\app.asar.unpacked\src\static

For macOS, it's located in /Applications/Slack.app/Contents/Resources/app.asar.unpacked/src/static

And basically what it does is just append the JavaScript snippet below into the ssb-interop.js file:

document.addEventListener("DOMContentLoaded", function () {
    $.ajax({
        url: "https://raw.githubusercontent.com/CaliCastle/slack-dark-theme/master/darkify.css",
        success: function (css) {
            $("<style></style>").appendTo("head").html(css);
        }
    });
});