#5572CC

CSS

:root {
  --skies-of-cyberspace: #5572cc;
  --skies-of-cyberspace-rgb: 85 114 204;
  --skies-of-cyberspace-oklch: oklch(0.574 0.142 268.2);
}

.element {
  color: var(--skies-of-cyberspace);
  background-color: hsl(225 54% 57%);
  border-color: oklch(0.574 0.142 268.2);
}

Tailwind CSS v4

@theme {
  --color-skies-of-cyberspace: #5572cc;
  --color-skies-of-cyberspace-50: #e5f4ff;
  --color-skies-of-cyberspace-100: #d5e6ff;
  --color-skies-of-cyberspace-200: #bdd2ff;
  --color-skies-of-cyberspace-300: #9bb4ff;
  --color-skies-of-cyberspace-400: #7b9af2;
  --color-skies-of-cyberspace-500: #5e7fe4;
  --color-skies-of-cyberspace-600: #506bc0;
  --color-skies-of-cyberspace-700: #40569a;
  --color-skies-of-cyberspace-800: #2b3f73;
  --color-skies-of-cyberspace-900: #1d2c51;
  --color-skies-of-cyberspace-950: #0d1836;
}

SCSS

$skies-of-cyberspace: #5572cc;
$skies-of-cyberspace-rgb: 85, 114, 204;
$skies-of-cyberspace-light: mix(#fff, $skies-of-cyberspace, 20%);
$skies-of-cyberspace-dark: mix(#000, $skies-of-cyberspace, 20%);

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