#877608

CSS

:root {
  --olive: #877608;
  --olive-rgb: 135 118 8;
  --olive-oklch: oklch(0.565 0.115 98.9);
}

.element {
  color: var(--olive);
  background-color: hsl(52 89% 28%);
  border-color: oklch(0.565 0.115 98.9);
}

Tailwind CSS v4

@theme {
  --color-olive: #877608;
  --color-olive-50: #fcf7d1;
  --color-olive-100: #f0eabe;
  --color-olive-200: #ded69d;
  --color-olive-300: #c4b973;
  --color-olive-400: #af9f49;
  --color-olive-500: #9a860a;
  --color-olive-600: #827210;
  --color-olive-700: #685b0e;
  --color-olive-800: #4e4206;
  --color-olive-900: #362e05;
  --color-olive-950: #211a00;
}

SCSS

$olive: #877608;
$olive-rgb: 135, 118, 8;
$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);
}