Passionate Blue

CSS

:root {
  --passionate-blue: #1f3465;
  --passionate-blue-rgb: 31 52 101;
  --passionate-blue-oklch: oklch(0.336 0.09 264.6);
}

.element {
  color: var(--passionate-blue);
  background-color: hsl(222 53% 26%);
  border-color: oklch(0.336 0.09 264.6);
}

Tailwind CSS v4

@theme {
  --color-passionate-blue: #1f3465;
  --color-passionate-blue-50: #e9f5ff;
  --color-passionate-blue-100: #dae8ff;
  --color-passionate-blue-200: #c3d4fc;
  --color-passionate-blue-300: #a2b7e7;
  --color-passionate-blue-400: #849ed4;
  --color-passionate-blue-500: #6885c2;
  --color-passionate-blue-600: #5871a4;
  --color-passionate-blue-700: #465a84;
  --color-passionate-blue-800: #314262;
  --color-passionate-blue-900: #222e45;
  --color-passionate-blue-950: #111a2c;
}

SCSS

$passionate-blue: #1f3465;
$passionate-blue-rgb: 31, 52, 101;
$passionate-blue-light: mix(#fff, $passionate-blue, 20%);
$passionate-blue-dark: mix(#000, $passionate-blue, 20%);

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