#01045E

CSS

:root {
  --alone-in-the-dark: #01045e;
  --alone-in-the-dark-rgb: 1 4 94;
  --alone-in-the-dark-oklch: oklch(0.224 0.147 264.7);
}

.element {
  color: var(--alone-in-the-dark);
  background-color: hsl(238 98% 19%);
  border-color: oklch(0.224 0.147 264.7);
}

Tailwind CSS v4

@theme {
  --color-alone-in-the-dark: #01045e;
  --color-alone-in-the-dark-50: #e2f5ff;
  --color-alone-in-the-dark-100: #d2e7ff;
  --color-alone-in-the-dark-200: #b8d3ff;
  --color-alone-in-the-dark-300: #95b5ff;
  --color-alone-in-the-dark-400: #739bf5;
  --color-alone-in-the-dark-500: #5580e6;
  --color-alone-in-the-dark-600: #486dc2;
  --color-alone-in-the-dark-700: #39579c;
  --color-alone-in-the-dark-800: #264075;
  --color-alone-in-the-dark-900: #192c52;
  --color-alone-in-the-dark-950: #0a1937;
}

SCSS

$alone-in-the-dark: #01045e;
$alone-in-the-dark-rgb: 1, 4, 94;
$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);
}