I think the most common way nowadays is to use the style attribute. Example:
<p style="font-family: Verdana; font-size: 10pt; color: #0000FF">
Your text goes here.
</p>
http://www.w3schools.com has some very good information on HTML. The method I have used is CSS (Cascading Style Sheets), so look it up if you need more information. There are other ways, but I feel this is most common.
kirkl_uk