#2F3C00

CSS

:root {
  --dark-olive: #2f3c00;
  --dark-olive-rgb: 47 60 0;
  --dark-olive-oklch: oklch(0.332 0.081 122.2);
}

.element {
  color: var(--dark-olive);
  background-color: hsl(73 100% 12%);
  border-color: oklch(0.332 0.081 122.2);
}

Tailwind CSS v4

@theme {
  --color-dark-olive: #2f3c00;
  --color-dark-olive-50: #f0fae1;
  --color-dark-olive-100: #e2edd0;
  --color-dark-olive-200: #cddbb5;
  --color-dark-olive-300: #aebf92;
  --color-dark-olive-400: #96a671;
  --color-dark-olive-500: #7d8f51;
  --color-dark-olive-600: #6a7945;
  --color-dark-olive-700: #546137;
  --color-dark-olive-800: #3f4726;
  --color-dark-olive-900: #2b3119;
  --color-dark-olive-950: #181d0a;
}

SCSS

$dark-olive: #2f3c00;
$dark-olive-rgb: 47, 60, 0;
$dark-olive-light: mix(#fff, $dark-olive, 20%);
$dark-olive-dark: mix(#000, $dark-olive, 20%);

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