Outline-offset

To create an inset border that is a border drawn inside a box element.

by Christian Bonato

HTML

<div class="outline-offset"></div>

CSS

.outline-offset {
    width:300px;
    height:200px;
    background:#333c4b;
    border:2px solid red;
    outline:2px #fff solid;
    outline-offset:-6px;
}