Tampermonkey (http://tampermonkey.net) script to change JIRA header color to black

jira_header_color.js

// ==UserScript==
// @name         JIRA Header color
// @namespace    https://stevenschobert.com/
// @version      0.1
// @description  Changes header color for JIRA.
// @author       Steven Schobert
// @match        https://ovenbits.atlassian.net/*
// @grant        GM_addStyle
// ==/UserScript==

(function() {
    'use strict';

    if (/jira/i.test(document.body.id)) {
        GM_addStyle([
            '.aui-header { background-color: #181818; }',
            '.aui-header .aui-button.aui-button-primary.aui-style { background-color: #525252; } ',
            '.aui-header .aui-nav .aui-button.aui-button-primary:hover { background-color: #757575; }',
            '.aui-header .aui-dropdown2-trigger:hover, .aui-header .aui-dropdown2-trigger:focus, .aui-header .aui-dropdown2-trigger.active { background-color: #525252; }',
        ].join(''));
    }
})();