#particles-js{
  width: 100%;
  height: 100%;
  position: fixed;
  background-color: #191919;
  background-image: url('');
  background-size: cover;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  z-index: -1;
  top: 0px;
  opacity: 0.3;
  filter: blur(2px);
}