#138900

CSS

:root {
  --fine-pine: #138900;
  --fine-pine-rgb: 19 137 0;
  --fine-pine-oklch: oklch(0.548 0.183 141.7);
}

.element {
  color: var(--fine-pine);
  background-color: hsl(112 100% 27%);
  border-color: oklch(0.548 0.183 141.7);
}

Tailwind CSS v4

@theme {
  --color-fine-pine: #138900;
  --color-fine-pine-50: #d6ffd4;
  --color-fine-pine-100: #c4f8c1;
  --color-fine-pine-200: #a4e9a2;
  --color-fine-pine-300: #7acf78;
  --color-fine-pine-400: #56b84b;
  --color-fine-pine-500: #21a210;
  --color-fine-pine-600: #208914;
  --color-fine-pine-700: #1a6e10;
  --color-fine-pine-800: #175003;
  --color-fine-pine-900: #0f3803;
  --color-fine-pine-950: #022200;
}

SCSS

$fine-pine: #138900;
$fine-pine-rgb: 19, 137, 0;
$fine-pine-light: mix(#fff, $fine-pine, 20%);
$fine-pine-dark: mix(#000, $fine-pine, 20%);

.element {
  color: $fine-pine;
  box-shadow: 0 0 0 2px rgba($fine-pine, 0.35);
}