#2E72E6

CSS

:root {
  --skies-of-cyberspace: #2e72e6;
  --skies-of-cyberspace-rgb: 46 114 230;
  --skies-of-cyberspace-oklch: oklch(0.575 0.189 260.4);
}

.element {
  color: var(--skies-of-cyberspace);
  background-color: hsl(218 79% 54%);
  border-color: oklch(0.575 0.189 260.4);
}

Tailwind CSS v4

@theme {
  --color-skies-of-cyberspace: #2e72e6;
  --color-skies-of-cyberspace-50: #d8f6ff;
  --color-skies-of-cyberspace-100: #c6e9ff;
  --color-skies-of-cyberspace-200: #a9d4ff;
  --color-skies-of-cyberspace-300: #82b5ff;
  --color-skies-of-cyberspace-400: #599bff;
  --color-skies-of-cyberspace-500: #327eff;
  --color-skies-of-cyberspace-600: #2c6bd8;
  --color-skies-of-cyberspace-700: #2256ae;
  --color-skies-of-cyberspace-800: #113f82;
  --color-skies-of-cyberspace-900: #0b2c5c;
  --color-skies-of-cyberspace-950: #01183f;
}

SCSS

$skies-of-cyberspace: #2e72e6;
$skies-of-cyberspace-rgb: 46, 114, 230;
$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);
}