#212225

CSS

:root {
  --noble-black: #212225;
  --noble-black-rgb: 33 34 37;
  --noble-black-oklch: oklch(0.252 0.006 271.2);
}

.element {
  color: var(--noble-black);
  background-color: hsl(225 6% 14%);
  border-color: oklch(0.252 0.006 271.2);
}

Tailwind CSS v4

@theme {
  --color-noble-black: #212225;
  --color-noble-black-50: #f4f5f7;
  --color-noble-black-100: #e7e8ea;
  --color-noble-black-200: #d3d4d7;
  --color-noble-black-300: #b6b7ba;
  --color-noble-black-400: #9d9ea2;
  --color-noble-black-500: #85868a;
  --color-noble-black-600: #707175;
  --color-noble-black-700: #5a5b5d;
  --color-noble-black-800: #414244;
  --color-noble-black-900: #2d2e2f;
  --color-noble-black-950: #1a1b1c;
}

SCSS

$noble-black: #212225;
$noble-black-rgb: 33, 34, 37;
$noble-black-light: mix(#fff, $noble-black, 20%);
$noble-black-dark: mix(#000, $noble-black, 20%);

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