change the main banner theme colour

Hello,

Is there a way to change the main banner theme colour so that when you're reducing the size of your internetscreen / or when you our using the website on a mobile device, that the colour stays the same.

I already used the following code to change to colour but as you see on the image attached this does not work.

.menu-wrapper-bg {
background: black;
}

Thank you

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

 div.logo {
background: black;
}

Thanks & Regards
Gourav Shrivastava

 

Thanks you for the help