Carbon

CSS

:root {
  --carbon: #333333;
  --carbon-rgb: 51 51 51;
  --carbon-oklch: oklch(0.321 0 0);
}

.element {
  color: var(--carbon);
  background-color: hsl(0 0% 20%);
  border-color: oklch(0.321 0 0);
}

Tailwind CSS v4

@theme {
  --color-carbon: #333333;
  --color-carbon-50: #f5f5f5;
  --color-carbon-100: #e8e8e8;
  --color-carbon-200: #d4d4d4;
  --color-carbon-300: #b7b7b7;
  --color-carbon-400: #9e9e9e;
  --color-carbon-500: #868686;
  --color-carbon-600: #717171;
  --color-carbon-700: #5b5b5b;
  --color-carbon-800: #424242;
  --color-carbon-900: #2e2e2e;
  --color-carbon-950: #1b1b1b;
}

SCSS

$carbon: #333333;
$carbon-rgb: 51, 51, 51;
$carbon-light: mix(#fff, $carbon, 20%);
$carbon-dark: mix(#000, $carbon, 20%);

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