Colorize background of AtCoder with your favorite color.
// ==UserScript==
// @name AtCoderBackGroundColorizer
// @namespace https://greasyfork.org/ja/scripts/377844
// @version 1.1
// @description Colorize background of AtCoder with your favorite color.
// @author Mister
// @match https://atcoder.jp/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
// -------------->8---------------------------->8--------------
// 色の指定
var paintingColor = "#E0F8E0";
// --------------8<----------------------------8<--------------
// 色を変える
var elm = document.getElementById('main-div');
elm.style.background = paintingColor;
})();