[Grace Themes]

Hi

To change the color of top menu bar in header section

Kindly Go to Appearance -> Basic Settings tab -> Custom CSS

and use below css code in custom css box

.header, .header-nav ul li a { background-color:#A3A3A3; opacity: 0.8 }

You will need to change color code. You can also change opacity to suit to your requirement.

Regards
Grace Themes