color change in header space

I must use a jpg image as the header...
http://camoduck.us/lmf

as a result it has a white background... but scrolling down when scrolling back up the header area turns grey, and its also grey on other pages... so it doesnt match,

I need the header area to stay white (on all pages and on scrolling), how and where would I change that?

Please add this code to override.css and make sure override is enabled in template settings.

Code: Select all

#gkHeaderNav.gk-fixed-nav {
    background: #fff none repeat scroll 0 0;
}