#797F00

CSS

:root {
  --olive: #797f00;
  --olive-rgb: 121 127 0;
  --olive-oklch: oklch(0.572 0.128 113.1);
}

.element {
  color: var(--olive);
  background-color: hsl(63 100% 25%);
  border-color: oklch(0.572 0.128 113.1);
}

Tailwind CSS v4

@theme {
  --color-olive: #797f00;
  --color-olive-50: #f3fad1;
  --color-olive-100: #e6eebd;
  --color-olive-200: #d2db9c;
  --color-olive-300: #b5bf72;
  --color-olive-400: #9fa645;
  --color-olive-500: #878e00;
  --color-olive-600: #737805;
  --color-olive-700: #5c6007;
  --color-olive-800: #454601;
  --color-olive-900: #2f3002;
  --color-olive-950: #1c1c00;
}

SCSS

$olive: #797f00;
$olive-rgb: 121, 127, 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);
}