#3D66D1

CSS

:root {
  --god-of-rain: #3d66d1;
  --god-of-rain-rgb: 61 102 209;
  --god-of-rain-oklch: oklch(0.54 0.172 265.3);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(223 62% 53%);
  border-color: oklch(0.54 0.172 265.3);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3d66d1;
  --color-god-of-rain-50: #dff5ff;
  --color-god-of-rain-100: #cee7ff;
  --color-god-of-rain-200: #b4d2ff;
  --color-god-of-rain-300: #90b4ff;
  --color-god-of-rain-400: #6d99ff;
  --color-god-of-rain-500: #4e7df6;
  --color-god-of-rain-600: #426ad0;
  --color-god-of-rain-700: #3455a7;
  --color-god-of-rain-800: #213f7d;
  --color-god-of-rain-900: #162b58;
  --color-god-of-rain-950: #08183c;
}

SCSS

$god-of-rain: #3d66d1;
$god-of-rain-rgb: 61, 102, 209;
$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);
}