#787A00

CSS

:root {
  --olive: #787a00;
  --olive-rgb: 120 122 0;
  --olive-oklch: oklch(0.559 0.123 110.9);
}

.element {
  color: var(--olive);
  background-color: hsl(61 100% 24%);
  border-color: oklch(0.559 0.123 110.9);
}

Tailwind CSS v4

@theme {
  --color-olive: #787a00;
  --color-olive-50: #f5fad2;
  --color-olive-100: #e8edbe;
  --color-olive-200: #d4da9e;
  --color-olive-300: #b8be73;
  --color-olive-400: #a2a548;
  --color-olive-500: #8a8d05;
  --color-olive-600: #75770d;
  --color-olive-700: #5e5f0c;
  --color-olive-800: #464504;
  --color-olive-900: #303004;
  --color-olive-950: #1d1c00;
}

SCSS

$olive: #787a00;
$olive-rgb: 120, 122, 0;
$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);
}