<div></div>

body {
  background-color: #000;
}

div {
  position: absolute;
  top: calc(50% - 150px);
  left: calc(50% - 150px);
  width: 300px;
  height: 300px;
  border-radius: 50%;
  box-shadow:
    inset 0 0 50px #fff,
    inset 20px 0 80px #f0f,
    inset -20px 0 80px #0ff,
    inset 20px 0 300px #f0f,
    inset -20px 0 300px #0ff,
    0 0 50px #fff,
    -10px 0 80px #f0f,
    10px 0 80px #0ff;
}