<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <title></title> <style type="text/css"> .item-1.red{color: red;} </style> </head> <body> <h1 class="item-1 red">1</h1> <h1 class="item-2">2</h1> </body> </html>