#7A781A

CSS

:root {
  --olive: #7a781a;
  --olive-rgb: 122 120 26;
  --olive-oklch: oklch(0.557 0.111 108.2);
}

.element {
  color: var(--olive);
  background-color: hsl(59 65% 29%);
  border-color: oklch(0.557 0.111 108.2);
}

Tailwind CSS v4

@theme {
  --color-olive: #7a781a;
  --color-olive-50: #f6f9d5;
  --color-olive-100: #e9ecc2;
  --color-olive-200: #d6d9a2;
  --color-olive-300: #babd7a;
  --color-olive-400: #a4a352;
  --color-olive-500: #8d8b22;
  --color-olive-600: #777620;
  --color-olive-700: #605e19;
  --color-olive-800: #47440f;
  --color-olive-900: #312f09;
  --color-olive-950: #1e1c00;
}

SCSS

$olive: #7a781a;
$olive-rgb: 122, 120, 26;
$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);
}