Header background

[Crazyfruitbat]

Hi guys, I'm having some problems with the header background on a new design.
How can get the blue background bar (behind the logo) at the top to be fixed-width?

I can find how to change the colour but making it fixed width I can't find...

Any ideas?

 

[Jake Bunce]

http://xenforo.com/community/threads/wallpaper-size.22055/#post-277459

 

[Crazyfruitbat]

http://xenforo.com/community/threads/wallpaper-size.22055/#post-277459

Awesome Jake - many thanks!