#303704

CSS

:root {
  --dark-olive: #303704;
  --dark-olive-rgb: 48 55 4;
  --dark-olive-oklch: oklch(0.319 0.07 117.6);
}

.element {
  color: var(--dark-olive);
  background-color: hsl(68 86% 12%);
  border-color: oklch(0.319 0.07 117.6);
}

Tailwind CSS v4

@theme {
  --color-dark-olive: #303704;
  --color-dark-olive-50: #f2f8e2;
  --color-dark-olive-100: #e5ecd2;
  --color-dark-olive-200: #d0d9b8;
  --color-dark-olive-300: #b3bd95;
  --color-dark-olive-400: #9ba475;
  --color-dark-olive-500: #828d56;
  --color-dark-olive-600: #6e7749;
  --color-dark-olive-700: #585f3a;
  --color-dark-olive-800: #414529;
  --color-dark-olive-900: #2d301b;
  --color-dark-olive-950: #1a1c0c;
}

SCSS

$dark-olive: #303704;
$dark-olive-rgb: 48, 55, 4;
$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);
}