When I have my browser scaled below full screen and click the hambuger button to see the menu, a colored (blue) appears over the rest of the window.  Since this is a custom color I chose, I know that's coming from somewhere, but I can't figure out where.  How do I get this to be transparent.

I also want to chage the width of the menu itself.  How do I do that.

I am using one of the blank templates that came with the program.

I attach a jpg with a screen capture.