#423457

CSS

:root {
  --sanctum-of-shadows: #423457;
  --sanctum-of-shadows-rgb: 66 52 87;
  --sanctum-of-shadows-oklch: oklch(0.356 0.062 301.8);
}

.element {
  color: var(--sanctum-of-shadows);
  background-color: hsl(264 25% 27%);
  border-color: oklch(0.356 0.062 301.8);
}

Tailwind CSS v4

@theme {
  --color-sanctum-of-shadows: #423457;
  --color-sanctum-of-shadows-50: #f9f1ff;
  --color-sanctum-of-shadows-100: #ece3f9;
  --color-sanctum-of-shadows-200: #daceea;
  --color-sanctum-of-shadows-300: #beb0d2;
  --color-sanctum-of-shadows-400: #a596bd;
  --color-sanctum-of-shadows-500: #8d7da9;
  --color-sanctum-of-shadows-600: #786a8f;
  --color-sanctum-of-shadows-700: #605472;
  --color-sanctum-of-shadows-800: #453e55;
  --color-sanctum-of-shadows-900: #302a3b;
  --color-sanctum-of-shadows-950: #1c1825;
}

SCSS

$sanctum-of-shadows: #423457;
$sanctum-of-shadows-rgb: 66, 52, 87;
$sanctum-of-shadows-light: mix(#fff, $sanctum-of-shadows, 20%);
$sanctum-of-shadows-dark: mix(#000, $sanctum-of-shadows, 20%);

.element {
  color: $sanctum-of-shadows;
  box-shadow: 0 0 0 2px rgba($sanctum-of-shadows, 0.35);
}