#87525A

CSS

:root {
  --nocturne-red: #87525a;
  --nocturne-red-rgb: 135 82 90;
  --nocturne-red-oklch: oklch(0.501 0.072 10.2);
}

.element {
  color: var(--nocturne-red);
  background-color: hsl(351 24% 43%);
  border-color: oklch(0.501 0.072 10.2);
}

Tailwind CSS v4

@theme {
  --color-nocturne-red: #87525a;
  --color-nocturne-red-50: #ffedf0;
  --color-nocturne-red-100: #ffdfe1;
  --color-nocturne-red-200: #f1c8cc;
  --color-nocturne-red-300: #d9a9ad;
  --color-nocturne-red-400: #c58d95;
  --color-nocturne-red-500: #b0727b;
  --color-nocturne-red-600: #956168;
  --color-nocturne-red-700: #774d53;
  --color-nocturne-red-800: #58383d;
  --color-nocturne-red-900: #3e262a;
  --color-nocturne-red-950: #271518;
}

SCSS

$nocturne-red: #87525a;
$nocturne-red-rgb: 135, 82, 90;
$nocturne-red-light: mix(#fff, $nocturne-red, 20%);
$nocturne-red-dark: mix(#000, $nocturne-red, 20%);

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