#505D32

CSS

:root {
  --zen-garden-olive: #505d32;
  --zen-garden-olive-rgb: 80 93 50;
  --zen-garden-olive-oklch: oklch(0.456 0.066 122.8);
}

.element {
  color: var(--zen-garden-olive);
  background-color: hsl(78 30% 28%);
  border-color: oklch(0.456 0.066 122.8);
}

Tailwind CSS v4

@theme {
  --color-zen-garden-olive: #505d32;
  --color-zen-garden-olive-50: #f1f9e4;
  --color-zen-garden-olive-100: #e3ecd4;
  --color-zen-garden-olive-200: #cedabb;
  --color-zen-garden-olive-300: #b0be99;
  --color-zen-garden-olive-400: #97a57a;
  --color-zen-garden-olive-500: #7e8e5c;
  --color-zen-garden-olive-600: #6b784e;
  --color-zen-garden-olive-700: #55603e;
  --color-zen-garden-olive-800: #3f462c;
  --color-zen-garden-olive-900: #2b301d;
  --color-zen-garden-olive-950: #191d0d;
}

SCSS

$zen-garden-olive: #505d32;
$zen-garden-olive-rgb: 80, 93, 50;
$zen-garden-olive-light: mix(#fff, $zen-garden-olive, 20%);
$zen-garden-olive-dark: mix(#000, $zen-garden-olive, 20%);

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