Run Example

Edit This Code:

<!DOCTYPE html>
<html>
 <head>
  <title> Page Title </title>
  <style type="text/css">
  #id_name {
   background: blue;
   font-size: 24px;
   color: #fff;
  }  
 </style>
 </head>

 <body>
  <h1 id="id_name"> This is an example of id selector. </h1>
 </body>
</html>

Result: