#151911

CSS

:root {
  --memorial-black: #151911;
  --memorial-black-rgb: 21 25 17;
  --memorial-black-oklch: oklch(0.206 0.017 129.4);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(90 19% 8%);
  border-color: oklch(0.206 0.017 129.4);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #151911;
  --color-memorial-black-50: #f3f6f1;
  --color-memorial-black-100: #e6e9e3;
  --color-memorial-black-200: #d2d6cf;
  --color-memorial-black-300: #b4b9b1;
  --color-memorial-black-400: #9ba096;
  --color-memorial-black-500: #83887d;
  --color-memorial-black-600: #6f736a;
  --color-memorial-black-700: #585c55;
  --color-memorial-black-800: #41433d;
  --color-memorial-black-900: #2d2f2a;
  --color-memorial-black-950: #1a1b18;
}

SCSS

$memorial-black: #151911;
$memorial-black-rgb: 21, 25, 17;
$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);
}