#3272D9

CSS

:root {
  --skies-of-cyberspace: #3272d9;
  --skies-of-cyberspace-rgb: 50 114 217;
  --skies-of-cyberspace-oklch: oklch(0.567 0.171 259.6);
}

.element {
  color: var(--skies-of-cyberspace);
  background-color: hsl(217 69% 52%);
  border-color: oklch(0.567 0.171 259.6);
}

Tailwind CSS v4

@theme {
  --color-skies-of-cyberspace: #3272d9;
  --color-skies-of-cyberspace-50: #daf6ff;
  --color-skies-of-cyberspace-100: #c9e9ff;
  --color-skies-of-cyberspace-200: #acd5ff;
  --color-skies-of-cyberspace-300: #86b7ff;
  --color-skies-of-cyberspace-400: #5e9dff;
  --color-skies-of-cyberspace-500: #3981f5;
  --color-skies-of-cyberspace-600: #326ecf;
  --color-skies-of-cyberspace-700: #2758a6;
  --color-skies-of-cyberspace-800: #16417c;
  --color-skies-of-cyberspace-900: #0e2d58;
  --color-skies-of-cyberspace-950: #02193b;
}

SCSS

$skies-of-cyberspace: #3272d9;
$skies-of-cyberspace-rgb: 50, 114, 217;
$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);
}