How to change 'zoom out ability' of the website user

[Jargynear]

I'm working on a site that has a background color of blue. I would like the blue to show no matter how far the user zooms out of the site. On the other hand I would like the user to only be able to zoom out so far (a little past the bottom of the page). How should I do this?My site (zoom out of it to see what I'm talking about):http://emilymagnuson.com/trustbank/index.htmlSample site that does what I want (zoom out of this one to see how it handles it.):http://www.marthastewart.comThank you!