#787B03

CSS

:root {
  --olive: #787b03;
  --olive-rgb: 120 123 3;
  --olive-oklch: oklch(0.562 0.123 111.5);
}

.element {
  color: var(--olive);
  background-color: hsl(61 95% 25%);
  border-color: oklch(0.562 0.123 111.5);
}

Tailwind CSS v4

@theme {
  --color-olive: #787b03;
  --color-olive-50: #f4fad2;
  --color-olive-100: #e7edbe;
  --color-olive-200: #d4db9e;
  --color-olive-300: #b7bf73;
  --color-olive-400: #a1a548;
  --color-olive-500: #8a8d06;
  --color-olive-600: #74770e;
  --color-olive-700: #5d600d;
  --color-olive-800: #464504;
  --color-olive-900: #303004;
  --color-olive-950: #1d1c00;
}

SCSS

$olive: #787b03;
$olive-rgb: 120, 123, 3;
$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);
}