Every social button has it's brand color and also simple, bordered and background layouts.
<a href="#" class="fa fa-twitter"></a>
<a href="#" class="fa fa-twitter border-icon"></a>
<a href="#" class="fa fa-twitter border-icon rounded"></a>
<a href="#" class="fa fa-twitter border-icon rounded-icon"></a>
<a href="#" class="fa fa-twitter bg-icon"></a>
<a href="#" class="fa fa-twitter bg-icon rounded"></a>
<a href="#" class="fa fa-twitter bg-icon rounded-icon"></a>
<a href="#" class="fa fa-twitter color-icon"></a>
<a href="#" class="fa fa-twitter color-icon bg-icon"></a>
<a href="#" class="fa fa-twitter color-icon bg-icon rounded"></a>
<a href="#" class="fa fa-twitter color-icon bg-icon rounded-icon"></a>
<a href="#" class="fa fa-twitter color-bg-icon"></a>
<a href="#" class="fa fa-twitter color-bg-icon rounded"></a>
<a href="#" class="fa fa-twitter color-bg-icon rounded-icon"></a>