CSS ribbon

ribbon.css

.ribbon-container{
  width: 300px;
  height: 300px;
  background: #FFF;
}

.ribbon-container .ribbon{
	position:relative;
	color:#fff;
	background:#f43059;
	font-size:1.5em;
	padding:10px 10px 10px 20px;
	
	margin-bottom:20px;
	text-shadow:0 -1px #d0284b, 0 1px #f96080;
	
	-moz-box-shadow:2px 2px 0 rgba(0,0,0,0.1);
	-webkit-box-shadow:2px 2px 0 rgba(0,0,0,0.1);
	-o-box-shadow:2px 2px 0 rgba(0,0,0,0.1);
	box-shadow:2px 2px 0 rgba(0,0,0,0.1);
}

.ribbon-container .ribbon:before{
	content:" ";
	display:block;
	position:absolute;
	bottom:0;
	margin-bottom:-10px;
	z-index:-1;
}

.ribbon-container .top-left{
    margin-left:-20px;
    float:left;
    clear: both;
}

.ribbon-container .top-left::before{
    content: "";
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 10px 10px 0;
    border-color: transparent #007bff transparent transparent;
    left:0;
    right: auto;

}

.ribbon-container .top-right{
    margin-right:-20px;
    float:right;
    clear: both;
}

.ribbon-container .top-right::before{
    content:" ";
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 10px 0 0;
    border-color: #007bff transparent transparent transparent;
    left:auto;
    right: 0;

}


.ribbon{
	position:relative;
	color:#fff;
	background:#f43059;
	font-size:1.5em;
	float:right;
	clear:both;
	padding:10px 10px 10px 20px;
	margin-right:-20px;
	margin-bottom:20px;
	text-shadow:0 -1px #d0284b, 0 1px #f96080;
	
	-moz-box-shadow:2px 2px 0 rgba(0,0,0,0.1);
	-webkit-box-shadow:2px 2px 0 rgba(0,0,0,0.1);
	-o-box-shadow:2px 2px 0 rgba(0,0,0,0.1);
	box-shadow:2px 2px 0 rgba(0,0,0,0.1);
}
.ribbon:before{
	content:" ";
	width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 10px 0 0;
  border-color: #007bff transparent transparent transparent;

	display:block;
	position:absolute;
	bottom:0;
	left:auto;
  right: 0;
	margin-bottom:-10px;
	z-index:-1;
}

ribbon.html

<div class="ribbon-container">
  <div class="ribbon top-right">
  HELLO CO BA
  </div>
</div>