#080060

CSS

:root {
  --alone-in-the-dark: #080060;
  --alone-in-the-dark-rgb: 8 0 96;
  --alone-in-the-dark-oklch: oklch(0.226 0.15 268.3);
}

.element {
  color: var(--alone-in-the-dark);
  background-color: hsl(245 100% 19%);
  border-color: oklch(0.226 0.15 268.3);
}

Tailwind CSS v4

@theme {
  --color-alone-in-the-dark: #080060;
  --color-alone-in-the-dark-50: #e4f4ff;
  --color-alone-in-the-dark-100: #d4e6ff;
  --color-alone-in-the-dark-200: #bbd2ff;
  --color-alone-in-the-dark-300: #9ab3ff;
  --color-alone-in-the-dark-400: #7999f7;
  --color-alone-in-the-dark-500: #5d7ee9;
  --color-alone-in-the-dark-600: #4f6bc4;
  --color-alone-in-the-dark-700: #3e559e;
  --color-alone-in-the-dark-800: #2a3f76;
  --color-alone-in-the-dark-900: #1c2b53;
  --color-alone-in-the-dark-950: #0d1838;
}

SCSS

$alone-in-the-dark: #080060;
$alone-in-the-dark-rgb: 8, 0, 96;
$alone-in-the-dark-light: mix(#fff, $alone-in-the-dark, 20%);
$alone-in-the-dark-dark: mix(#000, $alone-in-the-dark, 20%);

.element {
  color: $alone-in-the-dark;
  box-shadow: 0 0 0 2px rgba($alone-in-the-dark, 0.35);
}