#334100

CSS

:root {
  --dark-olive: #334100;
  --dark-olive-rgb: 51 65 0;
  --dark-olive-oklch: oklch(0.35 0.085 122.3);
}

.element {
  color: var(--dark-olive);
  background-color: hsl(73 100% 13%);
  border-color: oklch(0.35 0.085 122.3);
}

Tailwind CSS v4

@theme {
  --color-dark-olive: #334100;
  --color-dark-olive-50: #f0fadf;
  --color-dark-olive-100: #e1edcf;
  --color-dark-olive-200: #ccdbb3;
  --color-dark-olive-300: #aebf8f;
  --color-dark-olive-400: #95a76e;
  --color-dark-olive-500: #7c8f4d;
  --color-dark-olive-600: #697942;
  --color-dark-olive-700: #546134;
  --color-dark-olive-800: #3e4724;
  --color-dark-olive-900: #2b3118;
  --color-dark-olive-950: #181d09;
}

SCSS

$dark-olive: #334100;
$dark-olive-rgb: 51, 65, 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);
}