#7A780B

CSS

:root {
  --olive: #7a780b;
  --olive-rgb: 122 120 11;
  --olive-oklch: oklch(0.557 0.117 108.5);
}

.element {
  color: var(--olive);
  background-color: hsl(59 83% 26%);
  border-color: oklch(0.557 0.117 108.5);
}

Tailwind CSS v4

@theme {
  --color-olive: #7a780b;
  --color-olive-50: #f6f9d3;
  --color-olive-100: #e9ecbf;
  --color-olive-200: #d6d99f;
  --color-olive-300: #babd76;
  --color-olive-400: #a5a44c;
  --color-olive-500: #8e8b14;
  --color-olive-600: #787616;
  --color-olive-700: #605e12;
  --color-olive-800: #484508;
  --color-olive-900: #322f06;
  --color-olive-950: #1e1c00;
}

SCSS

$olive: #7a780b;
$olive-rgb: 122, 120, 11;
$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);
}