#3B65D4

CSS

:root {
  --god-of-rain: #3b65d4;
  --god-of-rain-rgb: 59 101 212;
  --god-of-rain-oklch: oklch(0.54 0.177 265.3);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(224 64% 53%);
  border-color: oklch(0.54 0.177 265.3);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3b65d4;
  --color-god-of-rain-50: #dff5ff;
  --color-god-of-rain-100: #cee7ff;
  --color-god-of-rain-200: #b3d2ff;
  --color-god-of-rain-300: #8fb3ff;
  --color-god-of-rain-400: #6b99ff;
  --color-god-of-rain-500: #4c7cfa;
  --color-god-of-rain-600: #4069d3;
  --color-god-of-rain-700: #3354a9;
  --color-god-of-rain-800: #203e7f;
  --color-god-of-rain-900: #152b5a;
  --color-god-of-rain-950: #07183d;
}

SCSS

$god-of-rain: #3b65d4;
$god-of-rain-rgb: 59, 101, 212;
$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);
}