Revolution Slider scrolls to gray

Hi there

I’m working my way through my new website having recently purchased Highend, which I love by the way.

Just a small issue is that the revolution slider has a gray bar at the top when I scroll down and the image fades out. I don’t mind the image fading but would rather not have the gray block at the top when I do so.

My site isn’t live yet so I have attached a screen shot.

Thanks in advance.