#80790E

CSS

:root {
  --olive: #80790e;
  --olive-rgb: 128 121 14;
  --olive-oklch: oklch(0.565 0.116 105.4);
}

.element {
  color: var(--olive);
  background-color: hsl(56 80% 28%);
  border-color: oklch(0.565 0.116 105.4);
}

Tailwind CSS v4

@theme {
  --color-olive: #80790e;
  --color-olive-50: #f8f8d2;
  --color-olive-100: #ebebbf;
  --color-olive-200: #d9d89f;
  --color-olive-300: #bdbc75;
  --color-olive-400: #a8a24b;
  --color-olive-500: #928a11;
  --color-olive-600: #7b7514;
  --color-olive-700: #635d11;
  --color-olive-800: #4a4408;
  --color-olive-900: #332f05;
  --color-olive-950: #1f1b00;
}

SCSS

$olive: #80790e;
$olive-rgb: 128, 121, 14;
$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);
}