Child of the Night

CSS

:root {
  --child-of-the-night: #220077;
  --child-of-the-night-rgb: 34 0 119;
  --child-of-the-night-oklch: oklch(0.277 0.169 279.4);
}

.element {
  color: var(--child-of-the-night);
  background-color: hsl(257 100% 23%);
  border-color: oklch(0.277 0.169 279.4);
}

Tailwind CSS v4

@theme {
  --color-child-of-the-night: #220077;
  --color-child-of-the-night-50: #ecf0ff;
  --color-child-of-the-night-100: #dee2ff;
  --color-child-of-the-night-200: #c7ccff;
  --color-child-of-the-night-300: #a9acff;
  --color-child-of-the-night-400: #8b91ff;
  --color-child-of-the-night-500: #7373f2;
  --color-child-of-the-night-600: #6162cc;
  --color-child-of-the-night-700: #4d4ea4;
  --color-child-of-the-night-800: #36397b;
  --color-child-of-the-night-900: #242757;
  --color-child-of-the-night-950: #14153b;
}

SCSS

$child-of-the-night: #220077;
$child-of-the-night-rgb: 34, 0, 119;
$child-of-the-night-light: mix(#fff, $child-of-the-night, 20%);
$child-of-the-night-dark: mix(#000, $child-of-the-night, 20%);

.element {
  color: $child-of-the-night;
  box-shadow: 0 0 0 2px rgba($child-of-the-night, 0.35);
}