#81A56A

CSS

:root {
  --garden-of-eden: #81a56a;
  --garden-of-eden-rgb: 129 165 106;
  --garden-of-eden-oklch: oklch(0.68 0.092 133.8);
}

.element {
  color: var(--garden-of-eden);
  background-color: hsl(97 25% 53%);
  border-color: oklch(0.68 0.092 133.8);
}

Tailwind CSS v4

@theme {
  --color-garden-of-eden: #81a56a;
  --color-garden-of-eden-50: #eafce2;
  --color-garden-of-eden-100: #dbefd1;
  --color-garden-of-eden-200: #c3deb7;
  --color-garden-of-eden-300: #a3c394;
  --color-garden-of-eden-400: #88ab72;
  --color-garden-of-eden-500: #6d9353;
  --color-garden-of-eden-600: #5c7d47;
  --color-garden-of-eden-700: #4a6438;
  --color-garden-of-eden-800: #364927;
  --color-garden-of-eden-900: #25331a;
  --color-garden-of-eden-950: #141e0a;
}

SCSS

$garden-of-eden: #81a56a;
$garden-of-eden-rgb: 129, 165, 106;
$garden-of-eden-light: mix(#fff, $garden-of-eden, 20%);
$garden-of-eden-dark: mix(#000, $garden-of-eden, 20%);

.element {
  color: $garden-of-eden;
  box-shadow: 0 0 0 2px rgba($garden-of-eden, 0.35);
}