Edit in JSFiddle

<div class="module">
  <h2>Community <a href="#">Blue</a></h2>
  <!-- stuff in module -->
</div>

.module{
    width: 300px;
}
.module h2 {
        position: relative;
        background: #ccc;
        padding: 0 0 0 10px;
        font-size: 16px;

        /* Thickness of the bar more easily achieved with line-height
           since padding would push link inward.  */
        line-height: 2;
}

.module h2 a {
        float: right;
        position: relative;
        text-decoration: none;
        color: white;
        padding: 0 10px 0 15px;
        border-left: 5px solid white;

    background-image: -webkit-gradient(linear, left top, left bottom, from(#444444), to(#999999)); /* Saf4+, Chrome */
  background-image: -webkit-linear-gradient(top, #123456, #999999); /* Chrome 10+, Saf5.1+, iOS 5+ */
  background-image:    -moz-linear-gradient(top, #123456, #999999); /* FF3.6 */
  background-image:     -ms-linear-gradient(top, #123456, #999999); /* IE10 */
  background-image:      -o-linear-gradient(top, #123456, #999999); /* Opera 11.10+ */
  background-image:         linear-gradient(top, #123456, #999999);
}
.module h2 a:before{
    background: transparent;
    width: 0px;
    height: 6px;
    display: block;
    content: "";
    position: absolute;
    left: 0;
    border-left: 5px solid white;
    border-right: 0px solid green;
    border-top: 5px solid white;
    border-bottom: 5px solid rgba(255,255,255,0);
}
.module h2 a:after{
    background: transparent;
    width: 0px;
    height: 6px;
    display: block;
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    border-left: 5px solid white;
    border-right: 0px solid green;
    border-top: 5px solid rgba(255,255,255,0);
    border-bottom: 5px solid white;
}
.module h2:after{
    position: absolute;
    width: 0; height: 0;
    content: "";
    left: 235px;
    border-left: 0px solid green;
    border-right: 5px solid white;
    border-top: 5px solid rgba(255,255,255,0);
    border-bottom: 5px solid rgba(255,255,255,0);
    top: 11px;
}