#3F6AFB

CSS

:root {
  --secret-of-mana: #3f6afb;
  --secret-of-mana-rgb: 63 106 251;
  --secret-of-mana-oklch: oklch(0.581 0.221 266.7);
}

.element {
  color: var(--secret-of-mana);
  background-color: hsl(226 96% 62%);
  border-color: oklch(0.581 0.221 266.7);
}

Tailwind CSS v4

@theme {
  --color-secret-of-mana: #3f6afb;
  --color-secret-of-mana-50: #dbf4ff;
  --color-secret-of-mana-100: #c9e5ff;
  --color-secret-of-mana-200: #add0ff;
  --color-secret-of-mana-300: #89afff;
  --color-secret-of-mana-400: #6393ff;
  --color-secret-of-mana-500: #4473ff;
  --color-secret-of-mana-600: #3a62ea;
  --color-secret-of-mana-700: #2e4ebc;
  --color-secret-of-mana-800: #1a3a8d;
  --color-secret-of-mana-900: #112864;
  --color-secret-of-mana-950: #051545;
}

SCSS

$secret-of-mana: #3f6afb;
$secret-of-mana-rgb: 63, 106, 251;
$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);
}