背景色を半透明
- <!DOCTYPE html>
- <html lang="ja">
- <head>
- <meta charset="UTF-8">
- <title>背景色を半透明</title>
- </head>
- <body>
- <h1>背景色を半透明</h1>
- <style type="text/css">
- .wrap
- {
- background:#ffcc00;
- padding:0.5em;
- }
- .wrap2
- {
- margin-top:0.5em;
- padding:0.5em;
- background: #0000ff;
- background: -moz-linear-gradient(#ffcc00, #0000ff);
- background: -o-linear-gradient(#ffcc00, #0000ff);
- background: -webkit-linear-gradient(#ffcc00, #0000ff);
- background: linear-gradient(#ffcc00, #0000ff);
- filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#ffcc00', endColorstr='#0000ff');
- }
- h2
- {
- margin:0;
- padding:0;
- font-size:1.2em;
- }
- .alpha
- {
- display:inline-block;
- margin-top:1em;
- padding:0.5em;
- border:1px solid #ccc;
- }
- .alpha h3
- {
- margin:0;
- padding:0;
- font-size:1em;
- }
- .alpha p
- {
- margin:0;
- padding:0.5em 0;
- }
- .opa100
- {
- backgeound-color:#fff;
- background:rgba(255, 255, 255, 1.0);
- }
- .opa75
- {
- backgeound-color:#fff;
- background:rgba(255, 255, 255, 0.75);
- }
- .opa50
- {
- backgeound-color:#fff;
- background:rgba(255, 255, 255, 0.5);
- }
- .opa25
- {
- backgeound-color:#fff;
- background:rgba(255, 255, 255, 0.25);
- }
- .opa0
- {
- backgeound-color:#fff;
- background:rgba(255, 255, 255, 0.0);
- }
- </style>
- <div class="wrap">
- <h2>背景が単一色のサンプル</h2>
- <div class="alpha opa100">
- <h3>不透明度100%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa75">
- <h3>不透明度75%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa50">
- <h3>不透明度50%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa25">
- <h3>不透明度25%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa0">
- <h3>不透明度0%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- </div>
- <div class="wrap2">
- <h2>背景がグラデーションのサンプル(※グラデじゃなくて画像でもこんな感じの不透明)</h2>
- <div class="alpha opa100">
- <h3>不透明度100%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa75">
- <h3>不透明度75%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa50">
- <h3>不透明度50%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa25">
- <h3>不透明度25%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- <div class="alpha opa0">
- <h3>不透明度0%</h3>
- <p><img src="images/catnapsample.gif" /></p>
- </div>
- </div>
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