#3F67CA

CSS

:root {
  --god-of-rain: #3f67ca;
  --god-of-rain-rgb: 63 103 202;
  --god-of-rain-oklch: oklch(0.538 0.16 264.9);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(223 57% 52%);
  border-color: oklch(0.538 0.16 264.9);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3f67ca;
  --color-god-of-rain-50: #e0f5ff;
  --color-god-of-rain-100: #d0e7ff;
  --color-god-of-rain-200: #b5d3ff;
  --color-god-of-rain-300: #92b4ff;
  --color-god-of-rain-400: #6f9afd;
  --color-god-of-rain-500: #517fef;
  --color-god-of-rain-600: #456cc9;
  --color-god-of-rain-700: #3656a2;
  --color-god-of-rain-800: #233f79;
  --color-god-of-rain-900: #172c56;
  --color-god-of-rain-950: #09183a;
}

SCSS

$god-of-rain: #3f67ca;
$god-of-rain-rgb: 63, 103, 202;
$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);
}