I figured out how to change the background color of a table! Okay, go to your site manager home, in the lower right corner should be a little box that has New site Editor or something on it. . .and then open the box and click Classic Editor. . .and then something around the lines of 'ADD NEW PARAGRAPH' should pop up and then you can take it from there. . .there you have it! and if that wasn't clear I can try to go over everything and write it down as I go. . .
You can also, hit new table and then in the bottom right corner type in the color you want and that works too. Either way.
