Hi E-Marketing Mix,
The mobile menu drop-down does not have any background color because whenever you open the menu it moves the whole website down and the drop-down gets the background color of the header.
Now you did some customization and the mobile menu does not push the content down, so you need to add additional CSS to have an additional background color.
Please add the CSS code below to X > Theme Options > CSS:
@media (max-width: 979px) {
.x-nav-wrap.mobile {
display: block;
background: #004980;
border-radius: 0 0 10px 10px;
padding: 10px;
}
}
1- I have found the proper CSS code selector using the Chrome browser Developer Toolbar:
https://www.youtube.com/watch?v=wcFnnxfA70g
2- For the CSS code itself, I suggest that you get started with this tutorial:
https://www.youtube.com/watch?v=yfoY53QXEnI
Thank you.