#4C1628

CSS

:root {
  --what-we-do-in-the-shadows: #4c1628;
  --what-we-do-in-the-shadows-rgb: 76 22 40;
  --what-we-do-in-the-shadows-oklch: oklch(0.294 0.083 3.2);
}

.element {
  color: var(--what-we-do-in-the-shadows);
  background-color: hsl(340 55% 19%);
  border-color: oklch(0.294 0.083 3.2);
}

Tailwind CSS v4

@theme {
  --color-what-we-do-in-the-shadows: #4c1628;
  --color-what-we-do-in-the-shadows-50: #ffecf2;
  --color-what-we-do-in-the-shadows-100: #ffdde4;
  --color-what-we-do-in-the-shadows-200: #f5c6cf;
  --color-what-we-do-in-the-shadows-300: #dda6b1;
  --color-what-we-do-in-the-shadows-400: #c98a99;
  --color-what-we-do-in-the-shadows-500: #b46e80;
  --color-what-we-do-in-the-shadows-600: #985e6d;
  --color-what-we-do-in-the-shadows-700: #7a4b57;
  --color-what-we-do-in-the-shadows-800: #5a3640;
  --color-what-we-do-in-the-shadows-900: #3f252c;
  --color-what-we-do-in-the-shadows-950: #281319;
}

SCSS

$what-we-do-in-the-shadows: #4c1628;
$what-we-do-in-the-shadows-rgb: 76, 22, 40;
$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);
}