.btn-success {
color: #fff;
background-color: #5cb85c;
border-color: #4cae4c;
}
<div class="contact-module">
<{$contactform.javascript}>
<form name="<{$contactform.name}>" action="<{$contactform.action}>" method="<{$contactform.method}>" <{$contactform.extra}>>
<h4><{$contactform.title}>h4>
<{foreach item=element from=$contactform.elements}>
<{if $element.hidden != true}>
<{$element.caption}>
<{$element.body}>
<{else}>
<{$element.body}>
<{/if}>
<{/foreach}>
form>
div>