#container, .container {
	filter: hue-rotate(35deg);
}

/*article
{
	filter: hue-rotate(-35deg);
}*/

#container::after, .container::after
{
	content: 'TEST SITE';
	position: fixed;
	bottom: 0.5em;
	left: 0.5em;
	background: #8000ff;
	padding: 0.5em 0.75em;
	border-radius: 0.25em;
	color: #fff;
	opacity: 0.2;
	box-shadow: -0.1em -0.1em 0.5em #444;
	pointer-events: none;
	font-size: 200%;
}