Strange gray bar are above main photos on every page

Having a hard time removing gray bar below top menu and before main photo on every page that mysteriously pops up. And the photos get cut off at the top. I have tried almost everything and it will not go away. It doesn’t matter if parallax is on or off. I appreciate your help on how to remove it!!
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Hi there… can you please to share your site URL here?`

It ended up being the background color (gray) which was appearing above the main photo. I changed it to white. This will work for now and my client is ok with it. Thank you for your quick reply to help.