Tom, I think what you're looking for is classes.
so This is really big!
This is a purple heading
or maybe .blog h2 {foo}
Always use heading elements to structure the content. This will help the
pages make sense to blind users, and google likes it too. Change what
they look like at will.
Do
Listers,
How do you handle styling heading elements (h1-h6) when you have
different page templates within a site? I run into this often. One
page has an obvious hierarchy in the design and another page has a
different layout where what you would make an h2, for example, looks
different from the h2