Chathams Blue

CSS

:root {
  --chathams-blue: #2c5971;
  --chathams-blue-rgb: 44 89 113;
  --chathams-blue-oklch: oklch(0.443 0.063 234);
}

.element {
  color: var(--chathams-blue);
  background-color: hsl(201 44% 31%);
  border-color: oklch(0.443 0.063 234);
}

Tailwind CSS v4

@theme {
  --color-chathams-blue: #2c5971;
  --color-chathams-blue-50: #e5f9ff;
  --color-chathams-blue-100: #d5ecfb;
  --color-chathams-blue-200: #bbd9ec;
  --color-chathams-blue-300: #99bdd4;
  --color-chathams-blue-400: #79a5be;
  --color-chathams-blue-500: #5a8daa;
  --color-chathams-blue-600: #4d7890;
  --color-chathams-blue-700: #3d6073;
  --color-chathams-blue-800: #2b4655;
  --color-chathams-blue-900: #1d313b;
  --color-chathams-blue-950: #0d1d25;
}

SCSS

$chathams-blue: #2c5971;
$chathams-blue-rgb: 44, 89, 113;
$chathams-blue-light: mix(#fff, $chathams-blue, 20%);
$chathams-blue-dark: mix(#000, $chathams-blue, 20%);

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