colors

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
</head>
<body>
   <div class="container">
      <p class="text-muted">muted</p>
      <p class="text-primary">important</p>
      <p class="text-success">success</p>
      <p class="text-info">information</p>
      <p class="text-warning">warning</p>
      <p class="text-danger">danger</p>
      <p class="text-secondary">secondery</p>
      <p class="text-dark">dark gray</p>
      <p class="text-light">light</p>
      <hr>
      <p class="bg-muted text-white">muted</p>
      <p class="bg-primary text-white">important</p>
      <p class="bg-success text-white">success</p>
      <p class="bg-info text-white">information</p>
      <p class="bg-warning text-white">warning</p>
      <p class="bg-danger text-white">danger</p>
      <p class="bg-secondary text-white">secondery</p>
      <p class="bg-dark text-white">dark gray</p>
      <p class="bg-light text-white">light</p>
   </div>
</body>
</html>