#if .invalid-number {
    background-color: rgb(252, 241, 233); /* Sandstein Warning orange light */
}

@keyframes number-formatted {
    from {
        /* background-color: rgb(214, 228, 242); */
        /* Sandstein blau 20% */
        background-color: rgb(133, 175, 215); /* Sandstein blau 60% */
    }
    to {
    }
}

.number-formatted-animation {
    animation-name: number-formatted;
    animation-duration: 200ms;
    animation-timing-function: ease-out;
}