.customerLogo img {
    height: 87px;
    display: block;
    margin: auto;
}

.customerLogo {
    position: relative;
}

.customerLogo:after {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    content: "";
    backdrop-filter: grayscale(1);
}

.customerLogo:hover:after {
    display: none;
}