#3764DA

CSS

:root {
  --god-of-rain: #3764da;
  --god-of-rain-rgb: 55 100 218;
  --god-of-rain-oklch: oklch(0.54 0.188 264.9);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(223 69% 54%);
  border-color: oklch(0.54 0.188 264.9);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #3764da;
  --color-god-of-rain-50: #ddf5ff;
  --color-god-of-rain-100: #cce7ff;
  --color-god-of-rain-200: #b0d2ff;
  --color-god-of-rain-300: #8cb3ff;
  --color-god-of-rain-400: #6798ff;
  --color-god-of-rain-500: #477bff;
  --color-god-of-rain-600: #3d68d8;
  --color-god-of-rain-700: #3054ae;
  --color-god-of-rain-800: #1d3e82;
  --color-god-of-rain-900: #132a5c;
  --color-god-of-rain-950: #06173f;
}

SCSS

$god-of-rain: #3764da;
$god-of-rain-rgb: 55, 100, 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);
}