Need background to repeat or stretch

I have a picture I used as a background image, it appears on all pages. I replaced the "bg.jpg" file in the /catalog/view/theme/Luxury/image directory. Luxury is the name of the template I'm using. When I go to a products page that has more than 2 rows of products the page length obviously needs to increase, but the image does not. So the image stops and then there is a big white space, and then the footer begins, which I have changed the color of. Is there a way to change the color of that extra white space that is created when the page length increases?

Thank you,

Using OC 1.5.0

Hi!
Open your stilesheet.css (theme/Luxury/stylesheet/stylesheet.css).
You will find this at line 5-8:

body{
color:....;
font:....;
etc,etc
background-image: url('../image/bg.jpg'); /* Insert this line there*/
}