#80761A

CSS

:root {
  --olive: #80761a;
  --olive-rgb: 128 118 26;
  --olive-oklch: oklch(0.558 0.108 102.8);
}

.element {
  color: var(--olive);
  background-color: hsl(54 66% 30%);
  border-color: oklch(0.558 0.108 102.8);
}

Tailwind CSS v4

@theme {
  --color-olive: #80761a;
  --color-olive-50: #f9f7d4;
  --color-olive-100: #edebc1;
  --color-olive-200: #dbd7a2;
  --color-olive-300: #bfbb79;
  --color-olive-400: #aaa151;
  --color-olive-500: #948822;
  --color-olive-600: #7d741f;
  --color-olive-700: #645c19;
  --color-olive-800: #4b430f;
  --color-olive-900: #342e09;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #80761a;
$olive-rgb: 128, 118, 26;
$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);
}