a.blueback{background-color: 
#30A3CB;
background-image: url(images/arrow-white-left.png);
background-repeat: no-repeat;
background-position: 5% 50%;
font-family: "Open Sans", arial;
font-size: 16px;
height: 34px;
line-height: 34px;
float: left;
color: 
white;
text-align: right;
padding: 0px 10px 0px 40px;
white-space: nowrap;
margin-left: 0px;
margin-bottom: 15px;clear:both; text-decoration:none;}

@media screen and (-webkit-min-device-pixel-ratio: 2),
screen and (max--moz-device-pixel-ratio: 2) { 
a.blueback{background-image:url(images/arrow-white-left@2x.png);background-size:24px 24px;}
}