Express Blue

CSS

:root {
  --express-blue: #395a73;
  --express-blue-rgb: 57 90 115;
  --express-blue-oklch: oklch(0.453 0.056 242.2);
}

.element {
  color: var(--express-blue);
  background-color: hsl(206 34% 34%);
  border-color: oklch(0.453 0.056 242.2);
}

Tailwind CSS v4

@theme {
  --color-express-blue: #395a73;
  --color-express-blue-50: #e8f7ff;
  --color-express-blue-100: #d9eafa;
  --color-express-blue-200: #c1d8eb;
  --color-express-blue-300: #a0bbd3;
  --color-express-blue-400: #82a3bd;
  --color-express-blue-500: #658ba9;
  --color-express-blue-600: #56768f;
  --color-express-blue-700: #445e72;
  --color-express-blue-800: #304554;
  --color-express-blue-900: #21303b;
  --color-express-blue-950: #101c25;
}

SCSS

$express-blue: #395a73;
$express-blue-rgb: 57, 90, 115;
$express-blue-light: mix(#fff, $express-blue, 20%);
$express-blue-dark: mix(#000, $express-blue, 20%);

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