<table>
        <tr>
            <th>Head One</th>
            <th>Head Two</th>
            <th>Head Three</th>

        </tr>
        <tr>
            <td>First Row One</td>
            <td> First Row Two</td>
            <td>First Row Three</td>
        </tr>
        <tr>
            <td>Second Row One</td>
            <td class="important">Second Row Two</td>
            <td>Second Row Three</td>
        </tr>
  
      <tr>
            <td>Third Row One</td>
            <td> Third Row Two</td>
            <td>Third Row Three</td>
        </tr>
    </table>

table{
 border-style: solid;
 border-width: 3px;
 border-color: darkgrey; 
}

table tr th{
  border-style: solid;
  border-width: 1px;
  border-color: blue;
  padding: 5px;
  
}
table tr td{
  border-style: solid;
  border-width: 1px;
  border-color: lightblue;
  padding: 3px 
}

.important{
  color:red;
}