Fist of the North Star

CSS

:root {
  --fist-of-the-north-star: #225599;
  --fist-of-the-north-star-rgb: 34 85 153;
  --fist-of-the-north-star-oklch: oklch(0.453 0.124 256.8);
}

.element {
  color: var(--fist-of-the-north-star);
  background-color: hsl(214 64% 37%);
  border-color: oklch(0.453 0.124 256.8);
}

Tailwind CSS v4

@theme {
  --color-fist-of-the-north-star: #225599;
  --color-fist-of-the-north-star-50: #e0f7ff;
  --color-fist-of-the-north-star-100: #cfeaff;
  --color-fist-of-the-north-star-200: #b5d6ff;
  --color-fist-of-the-north-star-300: #91b9f7;
  --color-fist-of-the-north-star-400: #6ea0e7;
  --color-fist-of-the-north-star-500: #4d87d7;
  --color-fist-of-the-north-star-600: #4272b5;
  --color-fist-of-the-north-star-700: #345b91;
  --color-fist-of-the-north-star-800: #22436c;
  --color-fist-of-the-north-star-900: #172e4c;
  --color-fist-of-the-north-star-950: #081b32;
}

SCSS

$fist-of-the-north-star: #225599;
$fist-of-the-north-star-rgb: 34, 85, 153;
$fist-of-the-north-star-light: mix(#fff, $fist-of-the-north-star, 20%);
$fist-of-the-north-star-dark: mix(#000, $fist-of-the-north-star, 20%);

.element {
  color: $fist-of-the-north-star;
  box-shadow: 0 0 0 2px rgba($fist-of-the-north-star, 0.35);
}