#3F6ABC

CSS

:root {
  --god-of-rain: #3f6abc;
  --god-of-rain-rgb: 63 106 188;
  --god-of-rain-oklch: oklch(0.535 0.137 262);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(219 50% 49%);
  border-color: oklch(0.535 0.137 262);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3f6abc;
  --color-god-of-rain-50: #e1f6ff;
  --color-god-of-rain-100: #d1e8ff;
  --color-god-of-rain-200: #b7d4ff;
  --color-god-of-rain-300: #94b7fe;
  --color-god-of-rain-400: #719def;
  --color-god-of-rain-500: #5283e0;
  --color-god-of-rain-600: #466fbd;
  --color-god-of-rain-700: #375998;
  --color-god-of-rain-800: #254171;
  --color-god-of-rain-900: #182d50;
  --color-god-of-rain-950: #091a35;
}

SCSS

$god-of-rain: #3f6abc;
$god-of-rain-rgb: 63, 106, 188;
$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);
}