#787B00

CSS

:root {
  --olive: #787b00;
  --olive-rgb: 120 123 0;
  --olive-oklch: oklch(0.562 0.124 111.5);
}

.element {
  color: var(--olive);
  background-color: hsl(61 100% 24%);
  border-color: oklch(0.562 0.124 111.5);
}

Tailwind CSS v4

@theme {
  --color-olive: #787b00;
  --color-olive-50: #f4fad1;
  --color-olive-100: #e7edbe;
  --color-olive-200: #d4db9d;
  --color-olive-300: #b7bf73;
  --color-olive-400: #a1a547;
  --color-olive-500: #8a8d02;
  --color-olive-600: #74770c;
  --color-olive-700: #5d600b;
  --color-olive-800: #464503;
  --color-olive-900: #303003;
  --color-olive-950: #1d1c00;
}

SCSS

$olive: #787b00;
$olive-rgb: 120, 123, 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);
}