body {background-color: chartreuse;}
.center {
    text-align: center;
    border-radius: 12px;
    background-color: chartreuse;
}

.dumm {
    text-align: center;
    border-radius: 5px;
    background-color: chartreuse;
    color: black;
    margin-left: 50px;
    margin-right: 50px;
    margin-top: 20px;
}

img {
    border-radius: 180px;
    background-color: chartreuse;
}