<button type="button" class="btn btn-outline-primary">Button 1</button>
<button type="button" class="btn btn-outline-secondary">Button 2</button>
<button type="button" class="btn btn-outline-success">Button 3</button>
<button type="button" class="btn btn-outline-danger">Button 4</button>
<button type="button" class="btn btn-outline-warning">Button 5</button>
<button type="button" class="btn btn-outline-info">Button 6</button>
<button type="button" class="btn btn-outline-light">Button 7</button>
<button type="button" class="btn btn-outline-dark">Button 8</button>