Dark Mode Content Background

So sorry for this simple and rudimentary question but when I copied up my new site the content area went white and I can’t track down the setting to make it dark.

Here is the original:
https://www.dropbox.com/s/8fm1btee7d3cuxk/Screenshot%202019-06-11%2022.45.41.png?dl=0

And here is the live site:
https://www.dropbox.com/s/i0oxhdd8blam15j/Screenshot%202019-06-11%2022.45.30.png?dl=0

How do I make the site content area dark?

So sorry, I’ve been through everything for the past 2 hours and can’t track it down.

Thank you!

Well, the plot thickens, because as I kept working I made it worse:

https://www.dropbox.com/s/551opmmh6s6ppfa/Screenshot%202019-06-11%2023.03.44.png?dl=0

Help!

I love the dark mode theme.

Fitz

Solved. Background gradient. Ok. Got it.