#0E030A

CSS

:root {
  --noir-fiction: #0e030a;
  --noir-fiction-rgb: 14 3 10;
  --noir-fiction-oklch: oklch(0.126 0.031 340);
}

.element {
  color: var(--noir-fiction);
  background-color: hsl(322 65% 3%);
  border-color: oklch(0.126 0.031 340);
}

Tailwind CSS v4

@theme {
  --color-noir-fiction: #0e030a;
  --color-noir-fiction-50: #fcf2f8;
  --color-noir-fiction-100: #f0e4eb;
  --color-noir-fiction-200: #decfd8;
  --color-noir-fiction-300: #c3b1bc;
  --color-noir-fiction-400: #ac98a4;
  --color-noir-fiction-500: #957f8d;
  --color-noir-fiction-600: #7e6b77;
  --color-noir-fiction-700: #65565f;
  --color-noir-fiction-800: #4a3e46;
  --color-noir-fiction-900: #332b30;
  --color-noir-fiction-950: #1f181d;
}

SCSS

$noir-fiction: #0e030a;
$noir-fiction-rgb: 14, 3, 10;
$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);
}