Kubrick header problems

Hey, I have problems with my Kubrick header.
Here is the link (click here)

In Photoshop, it says the background header as #3c3c3c. But when I uploaded it to my server, it doesn’t match the background. It forms a whiter shade of grey.

I have no problems with the footer (and the content background), considering I just inverted the image.

Why is it causing this?
I’m pretty sure it has something to do with the css/php, the one which enables you to change color via the admin panel.