/* gray filter */
.hero-slider,
.left-right-wrap,
.top-border,
.search,
.bar,
.menu,
.btn-wrap .btn{
  -moz-filter: grayscale(100%) !important;
  -webkit-filter: grayscale(100%) !important;
  filter: gray !important; /* IE6-9 */
  filter: grayscale(100%) !important;  
}