#3668CB

CSS

:root {
  --god-of-rain: #3668cb;
  --god-of-rain-rgb: 54 104 203;
  --god-of-rain-oklch: oklch(0.537 0.163 262.2);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(220 59% 50%);
  border-color: oklch(0.537 0.163 262.2);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3668cb;
  --color-god-of-rain-50: #def6ff;
  --color-god-of-rain-100: #cde8ff;
  --color-god-of-rain-200: #b1d4ff;
  --color-god-of-rain-300: #8db6ff;
  --color-god-of-rain-400: #689cfe;
  --color-god-of-rain-500: #4780f1;
  --color-god-of-rain-600: #3d6dcb;
  --color-god-of-rain-700: #3057a3;
  --color-god-of-rain-800: #1e407a;
  --color-god-of-rain-900: #142c56;
  --color-god-of-rain-950: #06193a;
}

SCSS

$god-of-rain: #3668cb;
$god-of-rain-rgb: 54, 104, 203;
$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);
}