[SOLVED] Page headlines - how to change font size

Here I am again. I've wrestled with this for a while and can't figure out what I'm doing wrong.

At: ATO->Style POSTS & PAGES-> HEADLINE Box: Text

I've put the following code to change the color from black to red, and reduce the (overwhelming) size of my page headlines :

padding: 0;
margin: 0;
font-size: 0.8em;
color: #E60000;

But this has no effect. Should I be changing the H1 code somewhere??

THANKS!