Majestic Blue

CSS

:root {
  --majestic-blue: #3f425c;
  --majestic-blue-rgb: 63 66 92;
  --majestic-blue-oklch: oklch(0.387 0.044 279);
}

.element {
  color: var(--majestic-blue);
  background-color: hsl(234 19% 30%);
  border-color: oklch(0.387 0.044 279);
}

Tailwind CSS v4

@theme {
  --color-majestic-blue: #3f425c;
  --color-majestic-blue-50: #f2f4ff;
  --color-majestic-blue-100: #e5e7f7;
  --color-majestic-blue-200: #d0d2e7;
  --color-majestic-blue-300: #b3b5ce;
  --color-majestic-blue-400: #989cb9;
  --color-majestic-blue-500: #7f84a4;
  --color-majestic-blue-600: #6c6f8a;
  --color-majestic-blue-700: #56596f;
  --color-majestic-blue-800: #3e4152;
  --color-majestic-blue-900: #2b2d39;
  --color-majestic-blue-950: #181a23;
}

SCSS

$majestic-blue: #3f425c;
$majestic-blue-rgb: 63, 66, 92;
$majestic-blue-light: mix(#fff, $majestic-blue, 20%);
$majestic-blue-dark: mix(#000, $majestic-blue, 20%);

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