alloyux on "Sidebar Width"

I've recently adjusted my content box on my blog and I'm just getting used to WordPress.

http://www.alloyux.com

I can't find out the right value to change in my CSS (and certainly not my html/php) that will adjust the sidebar to take up the rest of the space on the left side of the page.

Here's a link to the CSS even though I assume most of you are right clicking on the page to see elements.

http://www.alloyux.com/wp-content/themes/contact/style.css