MediaWiki:Common.css

body.mediawiki {
    /*background-image: url(https://i.imgur.com/eF5XGlK.png);*/
    background-attachment: fixed;
    background-position: top left;
    background-repeat: no-repeat>;
}

#bodyContent { background-color: yellow; } 

#firstHeading { background-color: red; }

#mw-head-base { background-color: blue; } 
#p-logo { background-color: pink; }

#p-navigation { background-color: purple; } 

body { background-color: #121C25; }

#p-tb { background-color: orange; }