#586ECD

CSS

:root {
  --god-of-rain: #586ecd;
  --god-of-rain-rgb: 88 110 205;
  --god-of-rain-oklch: oklch(0.568 0.148 271.2);
}

.element {
  color: var(--god-of-rain);
  background-color: hsl(229 54% 57%);
  border-color: oklch(0.568 0.148 271.2);
}

Tailwind CSS v4

@theme {
  --color-god-of-rain: #586ecd;
  --color-god-of-rain-50: #e7f3ff;
  --color-god-of-rain-100: #d7e5ff;
  --color-god-of-rain-200: #bfd0ff;
  --color-god-of-rain-300: #9fb2ff;
  --color-god-of-rain-400: #7f98f5;
  --color-god-of-rain-500: #647ce7;
  --color-god-of-rain-600: #5469c3;
  --color-god-of-rain-700: #43549d;
  --color-god-of-rain-800: #2e3e75;
  --color-god-of-rain-900: #1f2b53;
  --color-god-of-rain-950: #0f1837;
}

SCSS

$god-of-rain: #586ecd;
$god-of-rain-rgb: 88, 110, 205;
$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);
}