You also can use bootstrap
Here is an example:
cp_full_height - JSFiddle[
^]
full code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />
<title></title>
<style>
.fill {
height: 100vh;
}
.leftBgColor, .rightBgColor {
height: 100vh;
background: red;
}
.rightBgColor {
background: blue;
}
</style>
</head>
<body>
<div class="container-full fill">
<div class="row">
<div class="col-sm-4 leftBgColor">
40%
</div>
<div class="col-sm-8 rightBgColor">
60%
</div>
</div>
</div>
</body>
</html>