#5766EB

CSS

:root {
  --secret-of-mana: #5766eb;
  --secret-of-mana-rgb: 87 102 235;
  --secret-of-mana-oklch: oklch(0.573 0.199 273.5);
}

.element {
  color: var(--secret-of-mana);
  background-color: hsl(234 79% 63%);
  border-color: oklch(0.573 0.199 273.5);
}

Tailwind CSS v4

@theme {
  --color-secret-of-mana: #5766eb;
  --color-secret-of-mana-50: #e4f1ff;
  --color-secret-of-mana-100: #d5e3ff;
  --color-secret-of-mana-200: #bccdff;
  --color-secret-of-mana-300: #9cadff;
  --color-secret-of-mana-400: #7b90ff;
  --color-secret-of-mana-500: #6171ff;
  --color-secret-of-mana-600: #5261dd;
  --color-secret-of-mana-700: #414db2;
  --color-secret-of-mana-800: #2b3986;
  --color-secret-of-mana-900: #1d275f;
  --color-secret-of-mana-950: #0e1441;
}

SCSS

$secret-of-mana: #5766eb;
$secret-of-mana-rgb: 87, 102, 235;
$secret-of-mana-light: mix(#fff, $secret-of-mana, 20%);
$secret-of-mana-dark: mix(#000, $secret-of-mana, 20%);

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