<!DOCTYPE html> <html> <head> <title>background-position: left bottom 50%</title> <style type="text/css"> #outer { border: 1px solid black; width: 128px; height: 128px; } #inner1 { width: 128px; height: 128px; background-position: left bottom 50%; background-image: url(aqua-32x32.png); background-repeat: no-repeat; } </style> </head> <body> <div id="outer"><div id="inner1"></div></div> </body> </html>