Dutch Blue

CSS

:root {
  --dutch-blue: #4e6594;
  --dutch-blue-rgb: 78 101 148;
  --dutch-blue-oklch: oklch(0.509 0.08 263.8);
}

.element {
  color: var(--dutch-blue);
  background-color: hsl(220 31% 44%);
  border-color: oklch(0.509 0.08 263.8);
}

Tailwind CSS v4

@theme {
  --color-dutch-blue: #4e6594;
  --color-dutch-blue-50: #eaf5ff;
  --color-dutch-blue-100: #dbe8ff;
  --color-dutch-blue-200: #c4d4f8;
  --color-dutch-blue-300: #a4b7e1;
  --color-dutch-blue-400: #869ecf;
  --color-dutch-blue-500: #6b86bc;
  --color-dutch-blue-600: #5b719f;
  --color-dutch-blue-700: #485a7f;
  --color-dutch-blue-800: #33425e;
  --color-dutch-blue-900: #232e42;
  --color-dutch-blue-950: #121b2a;
}

SCSS

$dutch-blue: #4e6594;
$dutch-blue-rgb: 78, 101, 148;
$dutch-blue-light: mix(#fff, $dutch-blue, 20%);
$dutch-blue-dark: mix(#000, $dutch-blue, 20%);

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