#7C7A04

CSS

:root {
  --olive: #7c7a04;
  --olive-rgb: 124 122 4;
  --olive-oklch: oklch(0.563 0.121 108.6);
}

.element {
  color: var(--olive);
  background-color: hsl(59 94% 25%);
  border-color: oklch(0.563 0.121 108.6);
}

Tailwind CSS v4

@theme {
  --color-olive: #7c7a04;
  --color-olive-50: #f6f9d2;
  --color-olive-100: #e9ecbe;
  --color-olive-200: #d6da9e;
  --color-olive-300: #babd73;
  --color-olive-400: #a5a448;
  --color-olive-500: #8e8b06;
  --color-olive-600: #78760e;
  --color-olive-700: #605e0d;
  --color-olive-800: #484505;
  --color-olive-900: #322f04;
  --color-olive-950: #1e1c00;
}

SCSS

$olive: #7c7a04;
$olive-rgb: 124, 122, 4;
$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);
}