how to change color of navbar in html code example

Example: navbar background color css

<!-- Navbar text is dark and background is light -->
	<nav class="navbar navbar-light bg-light">
        <a class="navbar-brand" href="#">
          Light color background
      </a>
    </nav>
  
    <nav class="navbar navbar-light bg-warning">
        <a class="navbar-brand" href="#">
          Warning color background
      </a>
    </nav>
  
<!-- Navbar text is light and background is dark -->
    <nav class="navbar navbar-dark bg-dark">
        <a class="navbar-brand" href="#">
          Dark color background
      </a>
    </nav>
  
<!-- Similarly... -->
    <nav class="navbar navbar-dark bg-primary">
        <a class="navbar-brand" href="#">
          Primary color background
      </a>
    </nav>
  
    <nav class="navbar navbar-dark bg-secondary">
        <a class="navbar-brand" href="#">
          Secondary color background
      </a>
    </nav>
  
    <nav class="navbar navbar-dark bg-success">
        <a class="navbar-brand" href="#">
          Success color background
      </a>
    </nav>