#5170CA

CSS

:root {
  --god-of-rain: #5170ca;
  --god-of-rain-rgb: 81 112 202;
  --god-of-rain-oklch: oklch(0.566 0.143 267.4);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(225 53% 55%);
  border-color: oklch(0.566 0.143 267.4);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #5170ca;
  --color-god-of-rain-50: #e4f4ff;
  --color-god-of-rain-100: #d4e7ff;
  --color-god-of-rain-200: #bbd2ff;
  --color-god-of-rain-300: #9ab4ff;
  --color-god-of-rain-400: #799af3;
  --color-god-of-rain-500: #5c7fe4;
  --color-god-of-rain-600: #4e6cc1;
  --color-god-of-rain-700: #3e569b;
  --color-god-of-rain-800: #2a3f74;
  --color-god-of-rain-900: #1c2c52;
  --color-god-of-rain-950: #0d1937;
}

SCSS

$god-of-rain: #5170ca;
$god-of-rain-rgb: 81, 112, 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);
}