#396AC2

CSS

:root {
  --god-of-rain: #396ac2;
  --god-of-rain-rgb: 57 106 194;
  --god-of-rain-oklch: oklch(0.536 0.148 261.1);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(219 55% 49%);
  border-color: oklch(0.536 0.148 261.1);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #396ac2;
  --color-god-of-rain-50: #dff6ff;
  --color-god-of-rain-100: #cee9ff;
  --color-god-of-rain-200: #b3d5ff;
  --color-god-of-rain-300: #8fb7ff;
  --color-god-of-rain-400: #6b9df5;
  --color-god-of-rain-500: #4b83e7;
  --color-god-of-rain-600: #406fc2;
  --color-god-of-rain-700: #33599c;
  --color-god-of-rain-800: #204175;
  --color-god-of-rain-900: #152d52;
  --color-god-of-rain-950: #071a37;
}

SCSS

$god-of-rain: #396ac2;
$god-of-rain-rgb: 57, 106, 194;
$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);
}