#868900

CSS

:root {
  --olive: #868900;
  --olive-rgb: 134 137 0;
  --olive-oklch: oklch(0.607 0.134 111.3);
}

.element {
  color: var(--olive);
  background-color: hsl(61 100% 27%);
  border-color: oklch(0.607 0.134 111.3);
}

Tailwind CSS v4

@theme {
  --color-olive: #868900;
  --color-olive-50: #f4face;
  --color-olive-100: #e7edba;
  --color-olive-200: #d4db98;
  --color-olive-300: #b7bf6c;
  --color-olive-400: #a2a63d;
  --color-olive-500: #8a8d00;
  --color-olive-600: #757800;
  --color-olive-700: #5e6000;
  --color-olive-800: #464600;
  --color-olive-900: #313000;
  --color-olive-950: #1d1c00;
}

SCSS

$olive: #868900;
$olive-rgb: 134, 137, 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);
}