#5166BD

CSS

:root {
  --god-of-rain: #5166bd;
  --god-of-rain-rgb: 81 102 189;
  --god-of-rain-oklch: oklch(0.537 0.138 270.9);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(228 45% 53%);
  border-color: oklch(0.537 0.138 270.9);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #5166bd;
  --color-god-of-rain-50: #e8f3ff;
  --color-god-of-rain-100: #d8e6ff;
  --color-god-of-rain-200: #c0d1ff;
  --color-god-of-rain-300: #a0b3fe;
  --color-god-of-rain-400: #8099f0;
  --color-god-of-rain-500: #657ee1;
  --color-god-of-rain-600: #566bbd;
  --color-god-of-rain-700: #445598;
  --color-god-of-rain-800: #2f3f72;
  --color-god-of-rain-900: #202b50;
  --color-god-of-rain-950: #101835;
}

SCSS

$god-of-rain: #5166bd;
$god-of-rain-rgb: 81, 102, 189;
$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);
}