#81A570

CSS

:root {
  --garden-of-eden: #81a570;
  --garden-of-eden-rgb: 129 165 112;
  --garden-of-eden-oklch: oklch(0.681 0.085 135.9);
}

.element {
  color: var(--garden-of-eden);
  background-color: hsl(101 23% 54%);
  border-color: oklch(0.681 0.085 135.9);
}

Tailwind CSS v4

@theme {
  --color-garden-of-eden: #81a570;
  --color-garden-of-eden-50: #eafbe4;
  --color-garden-of-eden-100: #dbefd4;
  --color-garden-of-eden-200: #c3ddba;
  --color-garden-of-eden-300: #a3c298;
  --color-garden-of-eden-400: #88aa78;
  --color-garden-of-eden-500: #6c9359;
  --color-garden-of-eden-600: #5c7c4c;
  --color-garden-of-eden-700: #49643d;
  --color-garden-of-eden-800: #36492a;
  --color-garden-of-eden-900: #25331c;
  --color-garden-of-eden-950: #141e0c;
}

SCSS

$garden-of-eden: #81a570;
$garden-of-eden-rgb: 129, 165, 112;
$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);
}