#191808

CSS

:root {
  --memorial-black: #191808;
  --memorial-black-rgb: 25 24 8;
  --memorial-black-oklch: oklch(0.205 0.028 105.5);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(56 52% 6%);
  border-color: oklch(0.205 0.028 105.5);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #191808;
  --color-memorial-black-50: #f6f6ed;
  --color-memorial-black-100: #e9e9de;
  --color-memorial-black-200: #d5d5c8;
  --color-memorial-black-300: #b8b9a8;
  --color-memorial-black-400: #a0a08d;
  --color-memorial-black-500: #888872;
  --color-memorial-black-600: #737361;
  --color-memorial-black-700: #5c5c4d;
  --color-memorial-black-800: #444338;
  --color-memorial-black-900: #2f2e26;
  --color-memorial-black-950: #1b1b14;
}

SCSS

$memorial-black: #191808;
$memorial-black-rgb: 25, 24, 8;
$memorial-black-light: mix(#fff, $memorial-black, 20%);
$memorial-black-dark: mix(#000, $memorial-black, 20%);

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