#4B1A26

CSS

:root {
  --what-we-do-in-the-shadows: #4b1a26;
  --what-we-do-in-the-shadows-rgb: 75 26 38;
  --what-we-do-in-the-shadows-oklch: oklch(0.297 0.075 7.7);
}

.element {
  color: var(--what-we-do-in-the-shadows);
  background-color: hsl(345 49% 20%);
  border-color: oklch(0.297 0.075 7.7);
}

Tailwind CSS v4

@theme {
  --color-what-we-do-in-the-shadows: #4b1a26;
  --color-what-we-do-in-the-shadows-50: #ffedf0;
  --color-what-we-do-in-the-shadows-100: #ffdee2;
  --color-what-we-do-in-the-shadows-200: #f2c8cd;
  --color-what-we-do-in-the-shadows-300: #dba8af;
  --color-what-we-do-in-the-shadows-400: #c68c96;
  --color-what-we-do-in-the-shadows-500: #b1717d;
  --color-what-we-do-in-the-shadows-600: #96606a;
  --color-what-we-do-in-the-shadows-700: #784c54;
  --color-what-we-do-in-the-shadows-800: #59373e;
  --color-what-we-do-in-the-shadows-900: #3e262b;
  --color-what-we-do-in-the-shadows-950: #271418;
}

SCSS

$what-we-do-in-the-shadows: #4b1a26;
$what-we-do-in-the-shadows-rgb: 75, 26, 38;
$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);
}