try_w3examples_1 在线代码实例

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<!DOCTYPE html>
<html>
<head>
    <title>W3.CSS(w3cschool.cn)</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" charset="UTF-8">
    <link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
</head>
<div class="w3-container">
    <h1>背景颜色</h1>
    <p>w3-color 类定义 HTML 元素的背景色：</p>
</div>
<div class="w3-container w3-red">
    <h2>伦敦</h2>
    <p>伦敦是英国人口最多的城市，拥有超过900万居民。</p>
</div>
<div class="w3-container w3-teal">
    <h2>伦敦</h2>
    <p>伦敦是英国人口最多的城市，拥有超过900万居民。</p>
</div>
<div class="w3-container w3-yellow">
    <h2>伦敦</h2>
    <p>伦敦是英国人口最多的城市，拥有超过900万居民。</p>
</div>
<div class="w3-container w3-gray">
    <h2>伦敦</h2>
    <p>伦敦是英国人口最多的城市，拥有超过900万居民。</p>
</div>
<div class="w3-container w3-grey">
    <h2>伦敦</h2>
    <p>伦敦是英国人口最多的城市，拥有超过900万居民。</p>
 
 
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