Footer Site Notice Top and Bottom Margin

How to reduce these margins?

What I tried already:

/* Footer Abstand*/
.layout-full #colophon {
padding-bottom: 0px !important;
padding-top: 0px !important;
}
/* Footer Theme*/
#colophon #theme-attribution {
visibility: hidden;
}
#site-info {
margin: 0px;
}
#footer-widgets {
margin: 0px;
padding: 0px;
}

Didn’t work.