="center" style="font-size: 16px">
                                    <a href="{{action_url}}" style="display: inline-block; color: #fffffe; text-decoration: none; border-radius: 3px; box-shadow: 0 2px 3px rgba(0, 0, 0, 0.16); background-color: #22BC66; border-color: #22bc66; border-style: solid; border-width: 10px 18px">Pay Invoice</a>
                                  </td>
                                </tr>
                              </table>
                            </td>
                     