#586ECB

CSS

:root {
  --god-of-rain: #586ecb;
  --god-of-rain-rgb: 88 110 203;
  --god-of-rain-oklch: oklch(0.567 0.145 271.1);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(229 53% 57%);
  border-color: oklch(0.567 0.145 271.1);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #586ecb;
  --color-god-of-rain-50: #e7f3ff;
  --color-god-of-rain-100: #d7e6ff;
  --color-god-of-rain-200: #c0d1ff;
  --color-god-of-rain-300: #9fb2ff;
  --color-god-of-rain-400: #7f98f4;
  --color-god-of-rain-500: #647de5;
  --color-god-of-rain-600: #556ac1;
  --color-god-of-rain-700: #43559b;
  --color-god-of-rain-800: #2e3e74;
  --color-god-of-rain-900: #1f2b52;
  --color-god-of-rain-950: #0f1837;
}

SCSS

$god-of-rain: #586ecb;
$god-of-rain-rgb: 88, 110, 203;
$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);
}