#376AC4

CSS

:root {
  --god-of-rain: #376ac4;
  --god-of-rain-rgb: 55 106 196;
  --god-of-rain-oklch: oklch(0.537 0.151 260.8);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(218 56% 49%);
  border-color: oklch(0.537 0.151 260.8);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #376ac4;
  --color-god-of-rain-50: #def6ff;
  --color-god-of-rain-100: #cde9ff;
  --color-god-of-rain-200: #b2d5ff;
  --color-god-of-rain-300: #8eb7ff;
  --color-god-of-rain-400: #6a9df7;
  --color-god-of-rain-500: #4882e9;
  --color-god-of-rain-600: #3e6fc4;
  --color-god-of-rain-700: #31599e;
  --color-god-of-rain-800: #1f4176;
  --color-god-of-rain-900: #142d53;
  --color-god-of-rain-950: #061a38;
}

SCSS

$god-of-rain: #376ac4;
$god-of-rain-rgb: 55, 106, 196;
$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);
}