Hi owno
It belongs to the spotlight, you can override this css and change the background color as you wish.
.secondary-row .zen-spotlight,
#middlewrap .secondary-row .zen-spotlight {
background: #ef5236 url(../images/modules/highlightPattern.png);
color: #fff;
position: relative;
border-top: 5px solid rgba(0,0,0,0.2);
}