<div class="testtitle">This is a 28px title</div>

<div class="test">This is a section of red text.  Both of these are pulling from the "Template Styles" below.</div>

.test {color:#ff0000;}

.testtitle { font-size:28px; }

{{template config_path="design/email/header"}}
{{inlinecss file="email-inline.css"}}

{{template config_path="design/email/footer"}}