Find these tags and replace the contents accordingly:
#sfmenu li a
display: block;
line-height: 53px;
padding: 0 16px;
color: #f3f3f3;
text-shadow: 0 1px 0 #1d1d1d;
font-size: 12px;
-webkit-transition: all 0.6s linear;
-moz-transition: all 0.6s linear;
-o-transition: all 0.6s linear;
transition: all 0.6s linear;
#sfmenu li a:hover, #sfmenu li:hover a, #sfmenu li.sfhover a
background-color: #393c41;
color: #ddd;
text-decoration: none;
text-shadow: 0 1px 0 #1d1d1d;