#787000

CSS

:root {
  --olive: #787000;
  --olive-rgb: 120 112 0;
  --olive-oklch: oklch(0.535 0.113 104.6);
}

.element {
  color: var(--olive);
  background-color: hsl(56 100% 24%);
  border-color: oklch(0.535 0.113 104.6);
}

Tailwind CSS v4

@theme {
  --color-olive: #787000;
  --color-olive-50: #f8f8d3;
  --color-olive-100: #ecebc0;
  --color-olive-200: #dad8a0;
  --color-olive-300: #bebc76;
  --color-olive-400: #a9a24d;
  --color-olive-500: #928917;
  --color-olive-600: #7c7418;
  --color-olive-700: #635d14;
  --color-olive-800: #4a440a;
  --color-olive-900: #332f07;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #787000;
$olive-rgb: 120, 112, 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);
}