CSS border color border color : color : See the Pen <a href="http://codepen.io/w3tr/pen/QEAjOV/">border color</a> by W3TR (<a href="http://codepen.io/w3tr">@w3tr</a>) on <a href="http://codepen.io">CodePen</a>.<br /> See the Pen <a href="http://codepen.io/w3tr/pen/KrRdkb/">border color rgba</a> by W3TR (<a href="http://codepen.io/w3tr">@w3tr</a>) on <a href="http://codepen.io">CodePen</a>.<br /> See the Pen <a href='http://codepen.io/w3tr/pen/oLyZoZ/'>CSS border-color2</a> by W3TR (<a href='http://codepen.io/w3tr'>@w3tr</a>) on <a href='http://codepen.io'>CodePen</a>.<br /> transparent : See the Pen <a href="http://codepen.io/w3tr/pen/akGvqO/">border transparent</a> by W3TR (<a href="http://codepen.io/w3tr">@w3tr</a>) on <a href="http://codepen.io">CodePen</a>.<br />