#16040C

CSS

:root {
  --noir-fiction: #16040c;
  --noir-fiction-rgb: 22 4 12;
  --noir-fiction-oklch: oklch(0.147 0.039 352.3);
}

.element {
  color: var(--noir-fiction);
  background-color: hsl(333 69% 5%);
  border-color: oklch(0.147 0.039 352.3);
}

Tailwind CSS v4

@theme {
  --color-noir-fiction: #16040c;
  --color-noir-fiction-50: #fff1f6;
  --color-noir-fiction-100: #f3e3e9;
  --color-noir-fiction-200: #e3ced5;
  --color-noir-fiction-300: #c8b0b8;
  --color-noir-fiction-400: #b195a1;
  --color-noir-fiction-500: #9b7c89;
  --color-noir-fiction-600: #836974;
  --color-noir-fiction-700: #69545c;
  --color-noir-fiction-800: #4d3d44;
  --color-noir-fiction-900: #362a2f;
  --color-noir-fiction-950: #21181c;
}

SCSS

$noir-fiction: #16040c;
$noir-fiction-rgb: 22, 4, 12;
$noir-fiction-light: mix(#fff, $noir-fiction, 20%);
$noir-fiction-dark: mix(#000, $noir-fiction, 20%);

.element {
  color: $noir-fiction;
  box-shadow: 0 0 0 2px rgba($noir-fiction, 0.35);
}