@mixin spinkit-theme($background) {
  .sk-primary.sk-plane,
  .sk-primary .sk-chase-dot:before,
  .sk-primary .sk-bounce-dot,
  .sk-primary .sk-wave-rect,
  .sk-primary.sk-pulse,
  .sk-primary .sk-swing-dot,
  .sk-primary .sk-circle-dot:before,
  .sk-primary .sk-circle-fade-dot:before,
  .sk-primary .sk-grid-cube,
  .sk-primary .sk-fold-cube:before {
    background-color: $background;
  }
}