<!DOCTYPE html> <html> <head> <style type="text/css"> #parent { height: 40px; width: 200px; padding: 20px 0; background-color: green; } #child { height: 40px; width: 200px; background-color: lightgreen; } </style> </head> <body> <div id="parent"> <div id="child"></div> </div> </body> </html>