linkify-product-colors-swatch[data-on-sale] {
  position: relative;
}

linkify-product-colors-swatch[data-on-sale]::after {
  content: attr(data-on-sale);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  padding: 2px 6px;
  background: none;
  color: #d00000;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: none;
}