#82781F

CSS

:root {
  --olive: #82781f;
  --olive-rgb: 130 120 31;
  --olive-oklch: oklch(0.565 0.107 102.7);
}

.element {
  color: var(--olive);
  background-color: hsl(54 61% 32%);
  border-color: oklch(0.565 0.107 102.7);
}

Tailwind CSS v4

@theme {
  --color-olive: #82781f;
  --color-olive-50: #f9f7d5;
  --color-olive-100: #edeac2;
  --color-olive-200: #dbd7a3;
  --color-olive-300: #bfbb7a;
  --color-olive-400: #aaa152;
  --color-olive-500: #948824;
  --color-olive-600: #7d7421;
  --color-olive-700: #645c1a;
  --color-olive-800: #4b4310;
  --color-olive-900: #342e0a;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #82781f;
$olive-rgb: 130, 120, 31;
$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);
}