[SOLVED] How to change headline color, size and style

hello there, I have a problem with the headline, I have read some previous posts and followed the advice of Flynn and others but no improvement for now

I am in Atahualpa Theme Options, Post/page Styling, HEADLINE Box: Text, and have currently set:

padding: 0;
margin: 0;
font-size: 2.15em;
font-family: "arial", verdana, sans-serif;
color: #0000E3;

because I want a dark blue color for my headlines (0000E3) but nothing happens !!! headline is still the original, default color .... that is a kind of grey ! What am I am doing wrong ?

Also, what are the guidelines for changing the font ? If I want a Verdana font for my heading for example, what should I use for font-family ???

Your help will be much appreciated.