Different title background colors

Hi all, I’m using the Chameleon theme and I was wondering how difficult it is too have several background colors for titles. As you can see in the middle of the site the content area has 3 diferent items and I want those titles to have 3 different background colors.

The code below would change all titles to the same bg color, so is what I asked possible and if so, how?

.service h3.title {
    margin-bottom: 4px;
    margin-left: 5px;
    background-color: #cccccc;