#0E1409

CSS

:root {
  --memorial-black: #0e1409;
  --memorial-black-rgb: 14 20 9;
  --memorial-black-oklch: oklch(0.181 0.023 131.6);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(93 38% 6%);
  border-color: oklch(0.181 0.023 131.6);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #0e1409;
  --color-memorial-black-50: #f2f7f0;
  --color-memorial-black-100: #e5eae2;
  --color-memorial-black-200: #d0d7cc;
  --color-memorial-black-300: #b3baae;
  --color-memorial-black-400: #99a293;
  --color-memorial-black-500: #818a7a;
  --color-memorial-black-600: #6d7467;
  --color-memorial-black-700: #575d52;
  --color-memorial-black-800: #40443c;
  --color-memorial-black-900: #2c2f29;
  --color-memorial-black-950: #191c17;
}

SCSS

$memorial-black: #0e1409;
$memorial-black-rgb: 14, 20, 9;
$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);
}