meshviewer/scss/modules/_loader.scss

.loader {
  color: $color-primary;
  font-size: 1.8em;
  line-height: 2;
  margin: 30vh auto;
  text-align: center;
}

.spinner {
  path {
    &:first-of-type {
      animation: 1s spinner ease-in-out infinite alternate;
      opacity: 1;
    }
  }
}

@keyframes spinner {
  to {
    filter: grayscale(.8);
    opacity: .2;
  }
}