#898300

CSS

:root {
  --olive: #898300;
  --olive-rgb: 137 131 0;
  --olive-oklch: oklch(0.596 0.127 106.5);
}

.element {
  color: var(--olive);
  background-color: hsl(57 100% 27%);
  border-color: oklch(0.596 0.127 106.5);
}

Tailwind CSS v4

@theme {
  --color-olive: #898300;
  --color-olive-50: #f8f9cf;
  --color-olive-100: #ebecbb;
  --color-olive-200: #d8d999;
  --color-olive-300: #bdbd6d;
  --color-olive-400: #a8a33f;
  --color-olive-500: #918a00;
  --color-olive-600: #7b7500;
  --color-olive-700: #625e00;
  --color-olive-800: #4a4400;
  --color-olive-900: #332f00;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #898300;
$olive-rgb: 137, 131, 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);
}