hover color menu

hi,

i use this code to color background of level 1 main menu

.menu-item-top-level-1 a {
background-color: #adb8c1!important;
}

i want it vice versa, i want that color to appear on hover

i tried this code for hover

.menu-item-top-level-1 a:hover {
background-color: #adb8c1!important;
}