#3767CF

CSS

:root {
  --god-of-rain: #3767cf;
  --god-of-rain-rgb: 55 103 207;
  --god-of-rain-oklch: oklch(0.538 0.17 263.2);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(221 61% 51%);
  border-color: oklch(0.538 0.17 263.2);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3767cf;
  --color-god-of-rain-50: #def5ff;
  --color-god-of-rain-100: #cde8ff;
  --color-god-of-rain-200: #b1d3ff;
  --color-god-of-rain-300: #8db5ff;
  --color-god-of-rain-400: #689bff;
  --color-god-of-rain-500: #487ff5;
  --color-god-of-rain-600: #3d6cce;
  --color-god-of-rain-700: #3156a6;
  --color-god-of-rain-800: #1e3f7c;
  --color-god-of-rain-900: #142c58;
  --color-god-of-rain-950: #06183b;
}

SCSS

$god-of-rain: #3767cf;
$god-of-rain-rgb: 55, 103, 207;
$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);
}