change css style after modal is hide

when I click on my table row there appear modal window and change "tr" background-color indicates for each row was modal opened. However, when I close my modal background color of tr remains the same. How to change it to default?

<tr class='revisions'>
      <td>
      </td>

<td class="text-right">
                    <a  
                       data-toggle="modal" 
                       data-target="#revisionEdit" 
                       class='btn btn-warning revisionEdit'>
                        <span class="glyphicon glyphicon-pencil"></span>
                    </a>

</td>
</tr>

via Chebli Mohamed