<!DOCTYPE html> <html> <head> <style type="text/css"> .separator { height: 20px; background-color: blue; } #overflow-child { height: 200px; margin: 40px 0; background-color: green; } </style> </head> <body> <div class="separator"></div> <div id="overflow-child"></div> <div class="separator"></div> </body> </html>