Hello,
These dropdowns have the color scheme functionality which can help you to change background color from white to black or vice versa.
https://prnt.sc/Zfoj1uFabpxJ
Therefore in your case, the best solution for changing the color of the “Mobel-Set” menu dropdown item is to use the custom CSS code. Enter the below code to the “Custom CSS for desktop” area that is in Theme Settings -> Custom CSS.
.wd-dropdown-cats .menu-item-8807 .wd-dropdown-menu {
background-color: #EEE9E2;
}
Keep me informed of any issues.
Kind Regards