#3866D1

CSS

:root {
  --god-of-rain: #3866d1;
  --god-of-rain-rgb: 56 102 209;
  --god-of-rain-oklch: oklch(0.538 0.173 264);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(222 62% 52%);
  border-color: oklch(0.538 0.173 264);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3866d1;
  --color-god-of-rain-50: #def5ff;
  --color-god-of-rain-100: #cde7ff;
  --color-god-of-rain-200: #b1d3ff;
  --color-god-of-rain-300: #8eb4ff;
  --color-god-of-rain-400: #699aff;
  --color-god-of-rain-500: #497ef7;
  --color-god-of-rain-600: #3e6bd0;
  --color-god-of-rain-700: #3155a7;
  --color-god-of-rain-800: #1f3f7d;
  --color-god-of-rain-900: #142b59;
  --color-god-of-rain-950: #06183c;
}

SCSS

$god-of-rain: #3866d1;
$god-of-rain-rgb: 56, 102, 209;
$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);
}