Trying to customize nav bar color
I'm running a 5.8 Fundamental theme on Chrome, and I have zero CSS skills--only WYSIWYG. So, that might be a limiting factor in fixing this. But here goes...
I'm trying to get my nav bar to look uniform across the screen, but there is light blue on either side of the dark gray. I would like it all to be dark gray from edge to edge (rgb 92, 92, 92).
See the pic that illustrates the area.
I've tried to find the right place in the theme Customizer and also in edit mode. But I can't seem to find the right place.
I appreciate any help.