<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <!DOCTYPE html> <html> <head> <title>wide reference, 8x128 lime, 8x128 aqua</title> <link rel="author" title="Jeff Walden" href="http://whereswalden.com/" /> <style type="text/css"> div { width: 768px; height: 256px; } #outer { border: 1px solid black; } #inner { width: 8px; height: 256px; } #inner > div { width: 8px; height: 128px; } #top { background-color: lime; } #bottom { background-color: aqua; } </style> </head> <body> <div id="outer"><div id="inner"><div id="top"></div><div id="bottom"></div></div></div> </body> </html>