#380016

CSS

:root {
  --what-we-do-in-the-shadows: #380016;
  --what-we-do-in-the-shadows-rgb: 56 0 22;
  --what-we-do-in-the-shadows-oklch: oklch(0.22 0.088 3.6);
}

.element {
  color: var(--what-we-do-in-the-shadows);
  background-color: hsl(336 100% 11%);
  border-color: oklch(0.22 0.088 3.6);
}

Tailwind CSS v4

@theme {
  --color-what-we-do-in-the-shadows: #380016;
  --color-what-we-do-in-the-shadows-50: #ffebf1;
  --color-what-we-do-in-the-shadows-100: #ffdce3;
  --color-what-we-do-in-the-shadows-200: #f7c5cf;
  --color-what-we-do-in-the-shadows-300: #e0a5b1;
  --color-what-we-do-in-the-shadows-400: #cb8899;
  --color-what-we-do-in-the-shadows-500: #b76c80;
  --color-what-we-do-in-the-shadows-600: #9b5c6c;
  --color-what-we-do-in-the-shadows-700: #7c4956;
  --color-what-we-do-in-the-shadows-800: #5c3540;
  --color-what-we-do-in-the-shadows-900: #40242c;
  --color-what-we-do-in-the-shadows-950: #291319;
}

SCSS

$what-we-do-in-the-shadows: #380016;
$what-we-do-in-the-shadows-rgb: 56, 0, 22;
$what-we-do-in-the-shadows-light: mix(#fff, $what-we-do-in-the-shadows, 20%);
$what-we-do-in-the-shadows-dark: mix(#000, $what-we-do-in-the-shadows, 20%);

.element {
  color: $what-we-do-in-the-shadows;
  box-shadow: 0 0 0 2px rgba($what-we-do-in-the-shadows, 0.35);
}