<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<link rel="stylesheet" href="css/bootstrap.min.css" />
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-8">
<div class="row">
<div class="col-md-8">col-md-8</div>
<div class="col-md-4">col-md-4</div>
</div>
</div>
<div class="col-md-4">
<div class="row">
<div class="col-md-9">col-md-9</div>
<div class="col-md-3">col-md-3</div>
</div>
</div>
</div>
</div>
</body>
</html>
浏览器自身就没带颜色,如果是body的背景,你需要另外在引用的css文件或当前html的<head>内加
<style type="text/css">
body{
background: #00b4ef;
}
</style>
看这里