#151A04

CSS

:root {
  --memorial-black: #151a04;
  --memorial-black-rgb: 21 26 4;
  --memorial-black-oklch: oklch(0.206 0.04 120.2);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(74 73% 6%);
  border-color: oklch(0.206 0.04 120.2);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #151a04;
  --color-memorial-black-50: #f3f7eb;
  --color-memorial-black-100: #e5eadc;
  --color-memorial-black-200: #d1d7c5;
  --color-memorial-black-300: #b4bba5;
  --color-memorial-black-400: #9ba288;
  --color-memorial-black-500: #828b6d;
  --color-memorial-black-600: #6e755c;
  --color-memorial-black-700: #585e4a;
  --color-memorial-black-800: #414435;
  --color-memorial-black-900: #2d2f24;
  --color-memorial-black-950: #1a1c13;
}

SCSS

$memorial-black: #151a04;
$memorial-black-rgb: 21, 26, 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);
}