#131A04

CSS

:root {
  --memorial-black: #131a04;
  --memorial-black-rgb: 19 26 4;
  --memorial-black-oklch: oklch(0.204 0.041 124.1);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(79 73% 6%);
  border-color: oklch(0.204 0.041 124.1);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #131a04;
  --color-memorial-black-50: #f2f7eb;
  --color-memorial-black-100: #e4ebdc;
  --color-memorial-black-200: #d0d8c5;
  --color-memorial-black-300: #b2bca5;
  --color-memorial-black-400: #99a388;
  --color-memorial-black-500: #808b6d;
  --color-memorial-black-600: #6d765d;
  --color-memorial-black-700: #575e4a;
  --color-memorial-black-800: #404535;
  --color-memorial-black-900: #2c3024;
  --color-memorial-black-950: #191c13;
}

SCSS

$memorial-black: #131a04;
$memorial-black-rgb: 19, 26, 4;
$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);
}