Pfthb

I'm running a website in a desktop / app window in Chromium 70 on Windows 10.

Chromium 70 seems to use the theme-color meta attribute to color the app window frame. For websites which do not specify such an attribute, it seems to default to a (quite ugly) gray, no matter which theme the browser is running in.

For example, the window in the background here specified

<meta name="theme-color" content="#000000">

in the head while the foreground window has no such attribute:

I wanted to use a Tampermonkey script to add that attribute and recolor the app window frame, but it does not seem to have any effect, despite being added correctly to the head after checking back on it.

// ==UserScript==
// @name Discord App Color
// @namespace http://ray.syroot.com/discord
// @version 0.1
// @description Change the Discord app color.
// @author Ray
// @match https://discordapp.com/*
// @grant none
// ==/UserScript==

(function() 
 'use strict';

 var meta = document.createElement("meta");
 meta.name = "theme-color";
 meta.content = "#000000";
 document.getElementsByTagName("head")[0].appendChild(meta);
)();

Can it be that Chromium is not watching this theme-color meta tag at the right time? I already tried to specify

// @run-at document-start

to add it at the earliest time possible, but the window frame was still gray as seen above.