#817800

CSS

:root {
  --olive: #817800;
  --olive-rgb: 129 120 0;
  --olive-oklch: oklch(0.563 0.119 104.3);
}

.element {
  color: var(--olive);
  background-color: hsl(56 100% 25%);
  border-color: oklch(0.563 0.119 104.3);
}

Tailwind CSS v4

@theme {
  --color-olive: #817800;
  --color-olive-50: #f9f8d1;
  --color-olive-100: #ecebbd;
  --color-olive-200: #dad89d;
  --color-olive-300: #bfbc72;
  --color-olive-400: #aaa247;
  --color-olive-500: #938901;
  --color-olive-600: #7d740b;
  --color-olive-700: #645d0a;
  --color-olive-800: #4b4304;
  --color-olive-900: #342f03;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #817800;
$olive-rgb: 129, 120, 0;
$olive-light: mix(#fff, $olive, 20%);
$olive-dark: mix(#000, $olive, 20%);

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