#3865D6

CSS

:root {
  --god-of-rain: #3865d6;
  --god-of-rain-rgb: 56 101 214;
  --god-of-rain-oklch: oklch(0.54 0.181 264.6);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(223 66% 53%);
  border-color: oklch(0.54 0.181 264.6);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3865d6;
  --color-god-of-rain-50: #ddf5ff;
  --color-god-of-rain-100: #cce7ff;
  --color-god-of-rain-200: #b1d2ff;
  --color-god-of-rain-300: #8db3ff;
  --color-god-of-rain-400: #6899ff;
  --color-god-of-rain-500: #487cfc;
  --color-god-of-rain-600: #3e69d4;
  --color-god-of-rain-700: #3154ab;
  --color-god-of-rain-800: #1e3e80;
  --color-god-of-rain-900: #142b5a;
  --color-god-of-rain-950: #06183e;
}

SCSS

$god-of-rain: #3865d6;
$god-of-rain-rgb: 56, 101, 214;
$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);
}