Captains Blue

CSS

:root {
  --captains-blue: #557088;
  --captains-blue-rgb: 85 112 136;
  --captains-blue-oklch: oklch(0.533 0.049 245.7);
}

.element {
  color: var(--captains-blue);
  background-color: hsl(208 23% 43%);
  border-color: oklch(0.533 0.049 245.7);
}

Tailwind CSS v4

@theme {
  --color-captains-blue: #557088;
  --color-captains-blue-50: #eaf7ff;
  --color-captains-blue-100: #dbeaf8;
  --color-captains-blue-200: #c4d7e9;
  --color-captains-blue-300: #a4bad0;
  --color-captains-blue-400: #87a2ba;
  --color-captains-blue-500: #6b8aa5;
  --color-captains-blue-600: #5b758c;
  --color-captains-blue-700: #495d70;
  --color-captains-blue-800: #344552;
  --color-captains-blue-900: #232f39;
  --color-captains-blue-950: #121c24;
}

SCSS

$captains-blue: #557088;
$captains-blue-rgb: 85, 112, 136;
$captains-blue-light: mix(#fff, $captains-blue, 20%);
$captains-blue-dark: mix(#000, $captains-blue, 20%);

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