#171500

CSS

:root {
  --memorial-black: #171500;
  --memorial-black-rgb: 23 21 0;
  --memorial-black-oklch: oklch(0.192 0.041 105.2);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(55 100% 5%);
  border-color: oklch(0.192 0.041 105.2);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #171500;
  --color-memorial-black-50: #f6f6e9;
  --color-memorial-black-100: #e9e9da;
  --color-memorial-black-200: #d6d6c2;
  --color-memorial-black-300: #b9b9a2;
  --color-memorial-black-400: #a1a085;
  --color-memorial-black-500: #8a8869;
  --color-memorial-black-600: #757359;
  --color-memorial-black-700: #5d5c47;
  --color-memorial-black-800: #454333;
  --color-memorial-black-900: #2f2e23;
  --color-memorial-black-950: #1c1b12;
}

SCSS

$memorial-black: #171500;
$memorial-black-rgb: 23, 21, 0;
$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);
}