#556FCC

CSS

:root {
  --god-of-rain: #556fcc;
  --god-of-rain-rgb: 85 111 204;
  --god-of-rain-oklch: oklch(0.568 0.146 269.5);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(227 54% 57%);
  border-color: oklch(0.568 0.146 269.5);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #556fcc;
  --color-god-of-rain-50: #e6f4ff;
  --color-god-of-rain-100: #d6e6ff;
  --color-god-of-rain-200: #bed1ff;
  --color-god-of-rain-300: #9cb3ff;
  --color-god-of-rain-400: #7c99f5;
  --color-god-of-rain-500: #607de6;
  --color-god-of-rain-600: #526ac2;
  --color-god-of-rain-700: #41559c;
  --color-god-of-rain-800: #2c3f75;
  --color-god-of-rain-900: #1e2b52;
  --color-god-of-rain-950: #0e1837;
}

SCSS

$god-of-rain: #556fcc;
$god-of-rain-rgb: 85, 111, 204;
$god-of-rain-light: mix(#fff, $god-of-rain, 20%);
$god-of-rain-dark: mix(#000, $god-of-rain, 20%);

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