<div class="table-responsive">  
<table class="table mb-0">
<thead>
    <tr>
        <th scope="col">#</th>
        <th scope="col">First</th>
        <th scope="col">Last</th>
        <th scope="col">Handle</th>
    </tr>
</thead>
<tbody>
    <tr>
        <th scope="row">1</th>
        <td>Mark</td>
        <td>Otto</td>
        <td>@mdo</td>
    </tr>
    <tr>
        <th scope="row">2</th>
        <td>Jacob</td>
        <td>Thornton</td>
        <td>@fat</td>
    </tr>
    <tr>
        <th scope="row">3</th>
        <td>Larry</td>
        <td>the Bird</td>
        <td>@twitter</td>
    </tr>
</tbody>
</table>
</div>  

<div class="table-responsive">  
<table class="table table-dark mb-0">
<thead>
    <tr>
        <th scope="col">#</th>
        <th scope="col">First</th>
        <th scope="col">Last</th>
        <th scope="col">Handle</th>
    </tr>
</thead>
<tbody>
    <tr>
        <th scope="row">1</th>
        <td>Mark</td>
        <td>Otto</td>
        <td>@mdo</td>
    </tr>
    <tr>
        <th scope="row">2</th>
        <td>Jacob</td>
        <td>Thornton</td>
        <td>@fat</td>
    </tr>
    <tr>
        <th scope="row">3</th>
        <td>Larry</td>
        <td>the Bird</td>
        <td>@twitter</td>
    </tr>
</tbody>
</table>
</div>

<div class="table-responsive">  
<table class="table table-sm mb-0">
<thead>
    <tr>
        <th scope="col">#</th>
        <th scope="col">First</th>
        <th scope="col">Last</th>
        <th scope="col">Handle</th>
    </tr>
</thead>
<tbody>
    <tr>
        <th scope="row">1</th>
        <td>Mark</td>
        <td>Otto</td>
        <td>@mdo</td>
    </tr>
    <tr>
        <th scope="row">2</th>
        <td>Jacob</td>
        <td>Thornton</td>
        <td>@fat</td>
    </tr>
    <tr>
        <th scope="row">3</th>
        <td colspan="2">Larry the Bird</td>
        <td>@twitter</td>
    </tr>
</tbody>
</table>
</div>

<div class="table-responsive">  
<table class="table table-sm table-dark mb-0">
<thead>
    <tr>
        <th scope="col">#</th>
        <th scope="col">First</th>
        <th scope="col">Last</th>
        <th scope="col">Handle</th>
    </tr>
</thead>
<tbody>
    <tr>
        <th scope="row">1</th>
        <td>Mark</td>
        <td>Otto</td>
        <td>@mdo</td>
    </tr>
    <tr>
        <th scope="row">2</th>
        <td>Jacob</td>
        <td>Thornton</td>
        <td>@fat</td>
    </tr>
    <tr>
        <th scope="row">3</th>
        <td colspan="2">Larry the Bird</td>
        <td>@twitter</td>
    </tr>
</tbody>
</table>
</div>