body{
    background: #314755;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to bottom, #26a0da, #314755);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to bottom, #26a0da, #314755); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
        
}

.circulo {
    width: 130px;
    height: 130px;
    -moz-border-radius: 50%;
    -webkit-border-radius: 50%;
    border-radius: 50%;
    background: skyblue;
}