Self Assigned Fill Black

userscript.user.js

// ==UserScript==
// @name         Self Assigned Label Color
// @namespace    http://tampermonkey.net/
// @version      0.2.1
// @description  Add color to the assignee label if it is assigned to me
// @author       You
// @match        https://support.heroku.com/tags/*
// @match        https://support.heroku.com/inbox
// @match        https://support.heroku.com/search*
// @grant        none
// ==/UserScript==

document.querySelectorAll('.label-success').forEach(function(label) {
  if(label.innerText === agent.const.current_user.display_name) {
    label.style['background-color'] = 'black'; 
  }
});