Maastricht Blue

CSS

:root {
  --maastricht-blue: #001c3d;
  --maastricht-blue-rgb: 0 28 61;
  --maastricht-blue-oklch: oklch(0.228 0.072 253.9);
}

.element {
  color: var(--maastricht-blue);
  background-color: hsl(212 100% 12%);
  border-color: oklch(0.228 0.072 253.9);
}

Tailwind CSS v4

@theme {
  --color-maastricht-blue: #001c3d;
  --color-maastricht-blue-50: #e8f7ff;
  --color-maastricht-blue-100: #d9eaff;
  --color-maastricht-blue-200: #c0d6f4;
  --color-maastricht-blue-300: #9fbadd;
  --color-maastricht-blue-400: #81a1c9;
  --color-maastricht-blue-500: #6489b6;
  --color-maastricht-blue-600: #557499;
  --color-maastricht-blue-700: #445d7b;
  --color-maastricht-blue-800: #30445b;
  --color-maastricht-blue-900: #202f40;
  --color-maastricht-blue-950: #101b29;
}

SCSS

$maastricht-blue: #001c3d;
$maastricht-blue-rgb: 0, 28, 61;
$maastricht-blue-light: mix(#fff, $maastricht-blue, 20%);
$maastricht-blue-dark: mix(#000, $maastricht-blue, 20%);

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