yes, it is possible to change menu background color but we are not sure how you want to make this menu full width. So please for this make us a screenshot and also please attach url to your website.
Unfortunately this part of header can't be full width because header is wrapped into wrapper which is fixed width. But instead we can give you css to change color of this section to black and make it full width but only inside wrapper:
No, this is unfortunately not possible because for that must be recoded header. So probably only your website developer will be able to help in this case.
Comments
yes, it is possible to change menu background color but we are not sure how you want to make this menu full width. So please for this make us a screenshot and also please attach url to your website.
Thanks!
#Top_bar:not(.is-sticky) .menu_wrapper { background: #000 !important; width: 100%; }