This is all the “special” styling sticky posts get 🙂
article.sticky {
background: url("images/icon-back.png") repeat scroll 0 0 transparent;
border-radius: 10px;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
padding: 10px;
}
You can copy/paste this to any other class you like, eg:
.category_sticky_post {
background: #yourcolourcodehere;
border-radius: 10px;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
padding: 10px;
}