#0C1308

CSS

:root {
  --memorial-black: #0c1308;
  --memorial-black-rgb: 12 19 8;
  --memorial-black-oklch: oklch(0.176 0.024 134.5);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(98 41% 5%);
  border-color: oklch(0.176 0.024 134.5);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #0c1308;
  --color-memorial-black-50: #f2f7f0;
  --color-memorial-black-100: #e4eae2;
  --color-memorial-black-200: #d0d7cd;
  --color-memorial-black-300: #b2baae;
  --color-memorial-black-400: #98a293;
  --color-memorial-black-500: #7f8a7a;
  --color-memorial-black-600: #6c7567;
  --color-memorial-black-700: #565d52;
  --color-memorial-black-800: #3f443c;
  --color-memorial-black-900: #2b2f29;
  --color-memorial-black-950: #191c17;
}

SCSS

$memorial-black: #0c1308;
$memorial-black-rgb: 12, 19, 8;
$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);
}