<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>Black Tag Design Codes</h2> <button class="btn btn-blk">HTML</button> <button class="btn btn-blk">CSS</button> <button class="btn btn-blk">WordPress</button> <button class="btn btn-blk">Joomla</button> <button class="btn btn-blk">PHP</button> <button class="btn btn-blk">Python</button> <button class="btn btn-blk">Ruby</button> <button class="btn btn-blk">Java</button> </div> </div>

.btn.btn-blk{ background: #000; color: #fff; border-radius: 0; outline: 0; }