.rectangulo {
    width: 100%;
    height: 100px;
    background: linear-gradient(to right, #ecebea, #645d5d);
}

.oval1 {
    margin: -80px 0 0 -80px;
    width: 500px;
    height: 200px;
    transform: rotate(-5deg);
    border-radius: 80%;
    background: linear-gradient(to left, #e4e2e0, #adacac);
}
.oval2 {
    margin: -180px 0 0 -110px;
    width: 500px;
    height: 200px;
    transform: rotate(-3deg);
    border-radius: 80%;
    background: linear-gradient(to left, #f8f7f8, #adacac);
}
.oval-blanco {
    margin: -190px 0 0 -100px;
    width: 500px;
    height: 210px;
    transform: rotate(3deg);
    border-radius: 80%;
    background: #FFF;
}