Viennese Blue

CSS

:root {
  --viennese-blue: #4278af;
  --viennese-blue-rgb: 66 120 175;
  --viennese-blue-oklch: oklch(0.56 0.103 250.5);
}

.element {
  color: var(--viennese-blue);
  background-color: hsl(210 45% 47%);
  border-color: oklch(0.56 0.103 250.5);
}

Tailwind CSS v4

@theme {
  --color-viennese-blue: #4278af;
  --color-viennese-blue-50: #e1f8ff;
  --color-viennese-blue-100: #d0ebff;
  --color-viennese-blue-200: #b5d8ff;
  --color-viennese-blue-300: #91bbec;
  --color-viennese-blue-400: #6fa3da;
  --color-viennese-blue-500: #4d8ac8;
  --color-viennese-blue-600: #4275a9;
  --color-viennese-blue-700: #355e88;
  --color-viennese-blue-800: #234564;
  --color-viennese-blue-900: #173047;
  --color-viennese-blue-950: #081c2e;
}

SCSS

$viennese-blue: #4278af;
$viennese-blue-rgb: 66, 120, 175;
$viennese-blue-light: mix(#fff, $viennese-blue, 20%);
$viennese-blue-dark: mix(#000, $viennese-blue, 20%);

.element {
  color: $viennese-blue;
  box-shadow: 0 0 0 2px rgba($viennese-blue, 0.35);
}