<!DOCTYPE HTML> <title>Test for z-index relationship to border-radius clipping of overflow</title> <style> #one { position: absolute; background: blue; top: 50px; left: 50px; width: 100px; height: 100px } #two { position: absolute; border-radius: 15px; background: fuchsia; top: 25px; left: 75px; width: 100px; height: 100px } #three { position: absolute; background: yellow; top: 75px; left: 100px; width: 100px; height: 100px } </style> <div id="three"></div> <div id="two"></div> <div id="one"></div>