vB4 color?
 

I'm trying to figure out the exact colors for the default theme for vB so I can make a matching logo for my site.

This came out to be my response, simply because I didn't change the background color.

http://i.imgur.com/TinK09B.png

Can anyone tell me the blue colors? Not the white, the dark blue. I need the specific one so my logo would match the theme fine.

Thanks in advance!

Use a browser plugin. All major browsers have plugins/addons that can "color pick" from your screen. It will make your life a lot easier. :)

Background: #2F4456 --- But it does use a gradient which alters the color a bit.. (This is why a "color pick" might help unless you use the same gradient.
Gradient: /images/gradients/gradient-grey-down.png

The other thing you can do is not use the vbulletin gradient and it will match or make the logo with a transparent background.

Edit the header_background variable.

What would editing it do? I'm assuming this will allow me to change the color?

Correct.