#222222

CSS

:root {
  --young-night: #222222;
  --young-night-rgb: 34 34 34;
  --young-night-oklch: oklch(0.252 0 0);
}

.element {
  color: var(--young-night);
  background-color: hsl(0 0% 13%);
  border-color: oklch(0.252 0 0);
}

Tailwind CSS v4

@theme {
  --color-young-night: #222222;
  --color-young-night-50: #f5f5f5;
  --color-young-night-100: #e8e8e8;
  --color-young-night-200: #d4d4d4;
  --color-young-night-300: #b7b7b7;
  --color-young-night-400: #9e9e9e;
  --color-young-night-500: #868686;
  --color-young-night-600: #717171;
  --color-young-night-700: #5b5b5b;
  --color-young-night-800: #424242;
  --color-young-night-900: #2e2e2e;
  --color-young-night-950: #1b1b1b;
}

SCSS

$young-night: #222222;
$young-night-rgb: 34, 34, 34;
$young-night-light: mix(#fff, $young-night, 20%);
$young-night-dark: mix(#000, $young-night, 20%);

.element {
  color: $young-night;
  box-shadow: 0 0 0 2px rgba($young-night, 0.35);
}