Napoleonic Blue

CSS

:root {
  --napoleonic-blue: #2c4170;
  --napoleonic-blue-rgb: 44 65 112;
  --napoleonic-blue-oklch: oklch(0.382 0.085 264.6);
}

.element {
  color: var(--napoleonic-blue);
  background-color: hsl(221 44% 31%);
  border-color: oklch(0.382 0.085 264.6);
}

Tailwind CSS v4

@theme {
  --color-napoleonic-blue: #2c4170;
  --color-napoleonic-blue-50: #eaf5ff;
  --color-napoleonic-blue-100: #dbe8ff;
  --color-napoleonic-blue-200: #c4d4fa;
  --color-napoleonic-blue-300: #a4b7e4;
  --color-napoleonic-blue-400: #869ed1;
  --color-napoleonic-blue-500: #6a85bf;
  --color-napoleonic-blue-600: #5a71a1;
  --color-napoleonic-blue-700: #485a81;
  --color-napoleonic-blue-800: #324260;
  --color-napoleonic-blue-900: #222e43;
  --color-napoleonic-blue-950: #111a2b;
}

SCSS

$napoleonic-blue: #2c4170;
$napoleonic-blue-rgb: 44, 65, 112;
$napoleonic-blue-light: mix(#fff, $napoleonic-blue, 20%);
$napoleonic-blue-dark: mix(#000, $napoleonic-blue, 20%);

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