Ritterlich Blue

CSS

:root {
  --ritterlich-blue: #293286;
  --ritterlich-blue-rgb: 41 50 134;
  --ritterlich-blue-oklch: oklch(0.365 0.139 272.7);
}

.element {
  color: var(--ritterlich-blue);
  background-color: hsl(234 53% 34%);
  border-color: oklch(0.365 0.139 272.7);
}

Tailwind CSS v4

@theme {
  --color-ritterlich-blue: #293286;
  --color-ritterlich-blue-50: #e9f3ff;
  --color-ritterlich-blue-100: #dae5ff;
  --color-ritterlich-blue-200: #c2d0ff;
  --color-ritterlich-blue-300: #a2b2ff;
  --color-ritterlich-blue-400: #8398f0;
  --color-ritterlich-blue-500: #687ce1;
  --color-ritterlich-blue-600: #586abe;
  --color-ritterlich-blue-700: #465499;
  --color-ritterlich-blue-800: #313e72;
  --color-ritterlich-blue-900: #212b50;
  --color-ritterlich-blue-950: #111836;
}

SCSS

$ritterlich-blue: #293286;
$ritterlich-blue-rgb: 41, 50, 134;
$ritterlich-blue-light: mix(#fff, $ritterlich-blue, 20%);
$ritterlich-blue-dark: mix(#000, $ritterlich-blue, 20%);

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