#370019

CSS

:root {
  --what-we-do-in-the-shadows: #370019;
  --what-we-do-in-the-shadows-rgb: 55 0 25;
  --what-we-do-in-the-shadows-oklch: oklch(0.218 0.089 359.3);
}

.element {
  color: var(--what-we-do-in-the-shadows);
  background-color: hsl(333 100% 11%);
  border-color: oklch(0.218 0.089 359.3);
}

Tailwind CSS v4

@theme {
  --color-what-we-do-in-the-shadows: #370019;
  --color-what-we-do-in-the-shadows-50: #ffebf3;
  --color-what-we-do-in-the-shadows-100: #ffdce6;
  --color-what-we-do-in-the-shadows-200: #f6c5d2;
  --color-what-we-do-in-the-shadows-300: #dfa5b4;
  --color-what-we-do-in-the-shadows-400: #ca889d;
  --color-what-we-do-in-the-shadows-500: #b66c84;
  --color-what-we-do-in-the-shadows-600: #9a5c70;
  --color-what-we-do-in-the-shadows-700: #7b495a;
  --color-what-we-do-in-the-shadows-800: #5b3543;
  --color-what-we-do-in-the-shadows-900: #40242e;
  --color-what-we-do-in-the-shadows-950: #28131b;
}

SCSS

$what-we-do-in-the-shadows: #370019;
$what-we-do-in-the-shadows-rgb: 55, 0, 25;
$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);
}