#3365DA

CSS

:root {
  --god-of-rain: #3365da;
  --god-of-rain-rgb: 51 101 218;
  --god-of-rain-oklch: oklch(0.541 0.188 263.8);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(222 69% 53%);
  border-color: oklch(0.541 0.188 263.8);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3365da;
  --color-god-of-rain-50: #dcf5ff;
  --color-god-of-rain-100: #cae7ff;
  --color-god-of-rain-200: #aed2ff;
  --color-god-of-rain-300: #8ab3ff;
  --color-god-of-rain-400: #6499ff;
  --color-god-of-rain-500: #427cff;
  --color-god-of-rain-600: #3969d8;
  --color-god-of-rain-700: #2d54ae;
  --color-god-of-rain-800: #1b3e82;
  --color-god-of-rain-900: #112b5c;
  --color-god-of-rain-950: #04173f;
}

SCSS

$god-of-rain: #3365da;
$god-of-rain-rgb: 51, 101, 218;
$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);
}