Pseudo Elementable

Original: http://jsfiddle.net/simurai/Tny33/

by Jens Grochtdreis

HTML

<div class="pe">div div div div </div>
<a class="pe">Link Link Link</a>
<button class="pe">Button</button>
<input type="text" class="pe">

CSS

body { padding: 50px; }

.pe{
    display: block;
    position: relative;
    -webkit-appearance: none;
margin: 20px 0;    
}

.pe:before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 20px;
    height: 20px;
    background: pink;    
}