Try This . . . .
If you haven’t yet done so, create a new file called “custom.css” within file path —> /templates/teline_v/css/
Within that custom.css file, paste the following CSS rule::
.t3-header {
padding-bottom: 24px;
padding-top: 24px;
}
Add a “background” property to this rule – designating the color or image you wish to use.
Here are some references to further assist you . . . .
http://www.w3schools.com/cssref/pr_background-image.asp
http://www.csstutorial.net/2010/03/adding-a-background-image-with-css/
https://developer.mozilla.org/en-US/docs/Web/CSS/background-image