#181905

CSS

:root {
  --memorial-black: #181905;
  --memorial-black-rgb: 24 25 5;
  --memorial-black-oklch: oklch(0.207 0.035 111.6);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(63 67% 6%);
  border-color: oklch(0.207 0.035 111.6);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #181905;
  --color-memorial-black-50: #f5f6eb;
  --color-memorial-black-100: #e7e9dc;
  --color-memorial-black-200: #d4d6c5;
  --color-memorial-black-300: #b7baa5;
  --color-memorial-black-400: #9fa189;
  --color-memorial-black-500: #86896e;
  --color-memorial-black-600: #72745d;
  --color-memorial-black-700: #5b5d4a;
  --color-memorial-black-800: #434435;
  --color-memorial-black-900: #2e2f24;
  --color-memorial-black-950: #1b1b13;
}

SCSS

$memorial-black: #181905;
$memorial-black-rgb: 24, 25, 5;
$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);
}