Charcoal

CSS

:root {
  --charcoal: #343837;
  --charcoal-rgb: 52 56 55;
  --charcoal-oklch: oklch(0.336 0.006 179.4);
}

.element {
  color: var(--charcoal);
  background-color: hsl(165 4% 21%);
  border-color: oklch(0.336 0.006 179.4);
}

Tailwind CSS v4

@theme {
  --color-charcoal: #343837;
  --color-charcoal-50: #f3f6f5;
  --color-charcoal-100: #e6e8e8;
  --color-charcoal-200: #d2d5d4;
  --color-charcoal-300: #b4b8b7;
  --color-charcoal-400: #9b9f9e;
  --color-charcoal-500: #828786;
  --color-charcoal-600: #6e7371;
  --color-charcoal-700: #585c5b;
  --color-charcoal-800: #404342;
  --color-charcoal-900: #2c2e2e;
  --color-charcoal-950: #191b1a;
}

SCSS

$charcoal: #343837;
$charcoal-rgb: 52, 56, 55;
$charcoal-light: mix(#fff, $charcoal, 20%);
$charcoal-dark: mix(#000, $charcoal, 20%);

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