#86770D

CSS

:root {
  --olive: #86770d;
  --olive-rgb: 134 119 13;
  --olive-oklch: oklch(0.566 0.114 100.2);
}

.element {
  color: var(--olive);
  background-color: hsl(53 82% 29%);
  border-color: oklch(0.566 0.114 100.2);
}

Tailwind CSS v4

@theme {
  --color-olive: #86770d;
  --color-olive-50: #fbf7d2;
  --color-olive-100: #efeabe;
  --color-olive-200: #ddd79e;
  --color-olive-300: #c3ba74;
  --color-olive-400: #aea04a;
  --color-olive-500: #98870f;
  --color-olive-600: #807213;
  --color-olive-700: #675b10;
  --color-olive-800: #4d4207;
  --color-olive-900: #352e05;
  --color-olive-950: #211a00;
}

SCSS

$olive: #86770d;
$olive-rgb: 134, 119, 13;
$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);
}