#0D140A

CSS

:root {
  --memorial-black: #0d140a;
  --memorial-black-rgb: 13 20 10;
  --memorial-black-oklch: oklch(0.18 0.023 136.6);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(102 33% 6%);
  border-color: oklch(0.18 0.023 136.6);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #0d140a;
  --color-memorial-black-50: #f2f7f1;
  --color-memorial-black-100: #e4eae3;
  --color-memorial-black-200: #d0d7cd;
  --color-memorial-black-300: #b2baaf;
  --color-memorial-black-400: #98a295;
  --color-memorial-black-500: #7f8a7b;
  --color-memorial-black-600: #6c7568;
  --color-memorial-black-700: #565d53;
  --color-memorial-black-800: #3f443c;
  --color-memorial-black-900: #2b2f29;
  --color-memorial-black-950: #191c17;
}

SCSS

$memorial-black: #0d140a;
$memorial-black-rgb: 13, 20, 10;
$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);
}