Makes it clear if you're on a private Github repository or not by making the header background BLACK!

a-readme.md

Installation

You'll need:

• Firefox - https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/
• Chrome - https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo
• Safari/IE/Opera - No idea, look for greasemonkey-compatible addon/extension

Then, click on the following link and install the script: https://gist.github.com/VictorBjelkholm/5eb6502328bd2ed902ce5293ad80f33c/raw/136beeb89646e8eb81f56b24f03b60c1512c2885/is-private.user.js

is-private.user.js

// ==UserScript==
// @name        GithubPrivate
// @namespace   github
// @description Makes sure you know if a Github repository is Private or not
// @include     https://github.com/*
// @version     1
// @grant       none
// ==/UserScript==
(function() {
    var current_url = window.location.href
    var emptyArray = []
    var isPrivate = document.querySelector('.label.label-private.v-align-middle') !== null
    function main() {
      if (isPrivate) {
        var header = document.querySelector('.repohead.experiment-repo-nav')
        header.style.backgroundColor = '#000'
        var listItems = document.querySelectorAll('.reponav-item')
        emptyArray.forEach.call(listItems, function (item) {
          item.style.color = 'white';
        })
        document.querySelector('.reponav-item.selected').style.color = '#000'
        var topLinks = document.querySelectorAll('.private a');
        emptyArray.forEach.call(topLinks, function (link) {
          link.style.color = '#95b6e0';
        })
      }
    }
    // Yes, this is shitty indeed but no other way to figure out when Github is changing pages...
    if (isPrivate) {
        main()
        setInterval(function () {
            if (current_url !== window.location.href) {
                main()
            }
        }, 300)
    }
})()