#121704

CSS

:root {
  --memorial-black: #121704;
  --memorial-black-rgb: 18 23 4;
  --memorial-black-oklch: oklch(0.193 0.037 121.4);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(76 70% 5%);
  border-color: oklch(0.193 0.037 121.4);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #121704;
  --color-memorial-black-50: #f3f7ec;
  --color-memorial-black-100: #e5eadd;
  --color-memorial-black-200: #d1d7c6;
  --color-memorial-black-300: #b3bba7;
  --color-memorial-black-400: #9ba28a;
  --color-memorial-black-500: #828a6f;
  --color-memorial-black-600: #6e755f;
  --color-memorial-black-700: #585e4b;
  --color-memorial-black-800: #414436;
  --color-memorial-black-900: #2d2f25;
  --color-memorial-black-950: #1a1c14;
}

SCSS

$memorial-black: #121704;
$memorial-black-rgb: 18, 23, 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);
}