css/css-backgrounds/animations/background-color-animation-will-change-contents-ref.html - external/w3c/web-platform-tests - Git at Google

 <!DOCTYPE html>
 <style>
 .box {
   width: 600px;
   height: 600px;
   background-color: rgba(0, 200, 0, 1);
 }
 </style>
 <body>
   <div class='box'></div>
 </body>
	<!DOCTYPE html>
	<style>
	.box {
	width: 600px;
	height: 600px;
	background-color: rgba(0, 200, 0, 1);
	}
	</style>
	<body>
	<div class='box'></div>
	</body>