Colgroup tag for html CLICK READ MORE

<table>

  <colgroup>
    <col span="2" style="background-color:red">
    <col style="background-color:white">
  </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>
</table>

Definition and Usage

• The tag is used to format a set of one or more columns in a table.
• Instead of repeating styles for each cell, for each row, the tag may be used to add styles to entire columns.

• NOTE:The tag must be a child of an element, appearing after any and elements and before any thead>, tbody>, tfoot>, or tr> elements.
• Tip: To define different properties to a column within a <colgroup>, use the <col> tag within the <colgroup> tag.