<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <style>
      .featuredBtn.active {
        background-color: green;
        color: white;
      }

      .featuredBtn {
        width: 250px;
        height: 50px;
        color: #8c8c8c;
        font-weight: 700;
        background-color: #f4efeb;
        border: none;
        letter-spacing: 2px;
        outline: none;
      }
    </style>
  </head>
  <body>
    <div class="row">
      <div class="col-lg-12 col-xs-12" style="text-align: center">
        <button type="button" class="featuredBtn active" id="btnOne">
          BUTTON ONE
        </button>
        <button type="button" class="featuredBtn" id="btnTwo">
          BUTTON TWO
        </button>
        <button type="button" class="featuredBtn" id="btnThree">
          BUTTON THREE
        </button>
      </div>
    </div>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script>
      $('button').click(function () {
        $('button').removeClass('active');
        $(this).addClass('active');
      });
    </script>
  </body>
</html>
/* Add your styles here */

// Add your code here