#898200

CSS

:root {
  --olive: #898200;
  --olive-rgb: 137 130 0;
  --olive-oklch: oklch(0.594 0.127 105.9);
}

.element {
  color: var(--olive);
  background-color: hsl(57 100% 27%);
  border-color: oklch(0.594 0.127 105.9);
}

Tailwind CSS v4

@theme {
  --color-olive: #898200;
  --color-olive-50: #f8f9cf;
  --color-olive-100: #ebecbb;
  --color-olive-200: #d9d999;
  --color-olive-300: #bebc6e;
  --color-olive-400: #a9a340;
  --color-olive-500: #928a00;
  --color-olive-600: #7c7500;
  --color-olive-700: #635e00;
  --color-olive-800: #4a4400;
  --color-olive-900: #332f00;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #898200;
$olive-rgb: 137, 130, 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);
}