CSS color won't change

Hi, I am trying to change the post title color in the liquorice theme. When I change the colors in css, then go to my site, it only shows the correct color for a second then goes back to the teal blue color. Here it is with the correct color codes for the title and when it hovers:
#primaryContent h1.postTitle a,
#primaryContent h2.postTitle a {
background:#9acd32 url(images/title-bg.gif) repeat 0 0;
-moz-border-radius: 10px;
-o-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius:10px;
color:#fff;
font-size:24px;
font-weight:normal;
line-height:1.5em;
padding:10px 15px;
text-shadow:-1px -1px #333;
text-transform:uppercase;
}
#primaryContent h1.postTitle a:hover,
#primaryContent h2.postTitle a:hover,
#primaryContent .sticky h2.postTitle a:hover {
background:#000000 url(images/title-bg-over.gif) repeat 0 0;
text-decoration: none;

Please help. thehealthycollective.com