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Result Size: 625 x 571
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<!DOCTYPE html>
<html>
<head>
<style>
/* Default CSS Values */
table, th, td {
  border: 1px solid black;
}
​
colgroup {
  display: table-column-group;
}
</style>
</head>
<body>
​
<p>Look how the colgroup element is displayed below:</p>
​
<table>
  <colgroup>
    <col span="2" style="background-color:red">
    <col style="background-color:yellow">
  </colgroup>
  <tr>
    <th>ISBN</th>
    <th>Title</th>
    <th>Price</th>
  </tr>
  <tr>
    <td>3476896</td>
    <td>My first HTML</td>
    <td>$53</td>
  </tr>
  <tr>
    <td>5869207</td>
    <td>My first CSS</td>
    <td>$49</td>
  </tr>
</table>
​
<p>Change the default CSS settings to see the effect.</p>
​
</body>
​
<!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss_default_colgroup by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:36:21 GMT -->
</html>
​
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