html{
    height: 100%;
}

body {
    background: linear-gradient(217deg, rgba(255,0,0,.8), rgba(255,0,0,0) 70.71%),
            linear-gradient(127deg, rgba(0,255,0,.8), rgba(0,255,0,0) 70.71%),
            linear-gradient(336deg, rgba(0,0,255,.8), rgba(0,0,255,0) 70.71%);
    height:100%;
}

.center_tag{
    border-radius: 50%;
    border-width: 10px;
    border-style: solid;
    border-color: rgb(194, 194, 194,0.3);
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
    width: 30%
}

img{
    max-width: 100%;
    height: auto;
}