Hello,
Sorry for the delay due to the weekends.
Looks like the first question was solved.
how to change the color of the header scr: https://postimg.org/image/id7p0dbuj/
– please delete this code from Theme Options > Styling > Custom css http://prntscr.com/it4v31
then you will be able to change Header background in Theme Options > General > Header Settings.
Regards