Background color - remove top, bottom faded gray color
I want to change the background color of my site from gray to white. I was able to find some tutorials here, but can someone help me remove the faded gray color from the top and bottom of the site. It doesn't seem to be part of the background?
I don't want to post my url here as I don't want any backlinks from this forum, if you might have an idea, let me know and I will PM the site URL.
It's similar to this thread, mine has a gray line at the very top, above the header and a long gray line right before the footer: