changing h3 tag with css

[Boballoo]

I want to make the h3 tag without a big space before and after. I had it working with the following inline css (angle brackets removed):

<h3 style="margin-bottom: 0; margin-top: 0; line-height: 35px;">Manuscript Editing Services</h3>

But of course I want to add it to the external css file but when I do it doesn't work. I added the following to the css file:

.hmpg-h3 {
margin-bottom: 0;
margin-top: 0;
line-height: 35px;
}

the html that goes with it is here:

<h3 class="hmpg-h3">Manuscript Editing Services</h3>

I have uploaded the new css file. Emptied my cache and tested it but it is not working. If I View Source" the HTML is changed to the new css so it is able to access the new css file fine. What simple thing am I missing?

[mspjohn]

You dont need to create an H7 header element simply add the !important rule to a separate class in your css when changing the colour like this.

HTML

<h3 class="whiteTextOverride"> example with white text override </h3>
<h3> example with default colour </h3>