How to change/remove bar below slider?

Hi, yet another question:

There’s an area just below my revslider and I can’t figure out where to change it. Please see attached screenshot.

It is not the
– page background
– browser background
– content background
– slider background
– gallery background

Nor is it any part of the native WP entities that I’ve seen.

This bar is present in all page templates except, I think, “Blank”.

If I change the grid height of the slider, that bar remains the same size. This is true whether Unlimited Height is on or off.

Thanks!

PC, Win7 & Win8.1, Firefox