centering your blog page

hello. im having a bit of trouble centering my blog on my page. ive tried a couple lines ive found around other centering threads but none have really helped. my site is http://www.laced.com if you go to the blog plage youll see the way to big of gap on the right side (soft gray) of the blog box before it becomes the background (dark gray)

i do not have access to the server right now. only the wordpress login, so if theres a way to change it in wordpress’s editor that would be great!!! thanks in advance