Code html haut de page bas en couleur help

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>test</title>
		<style>
			html, body {
				width: 100%;
				height: 100%;
			}
			#haut {
				width: 100%;
				height: 25%;
				background-color: grey;
			}
			#bas {
				width: 100%;
				height: 75%;
				background-color: green;
			}
		</style>
	</head>
	<body>
		<div id="haut">
			Haut de page
		</div>
		<div id="bas">
			bas de page
		</div>
	</body>
</html>
</body>
</html>