[data-swatch]::before {
  background-color: rgba(var(--text-color) / 0.08);
}

[data-swatch="red"]:before { background-color:#ff0000}[data-swatch="light blue"]:before { background-color:#add8e6}[data-swatch="black"]:before { background-color:#000000}[data-swatch="green"]:before { background-color:#7CFC00}