Retro-Colonial Blue

CSS

:root {
  --retro-colonial-blue: #5a758a;
  --retro-colonial-blue-rgb: 90 117 138;
  --retro-colonial-blue-oklch: oklch(0.549 0.045 242);
}

.element {
  color: var(--retro-colonial-blue);
  background-color: hsl(206 21% 45%);
  border-color: oklch(0.549 0.045 242);
}

Tailwind CSS v4

@theme {
  --color-retro-colonial-blue: #5a758a;
  --color-retro-colonial-blue-50: #ebf7ff;
  --color-retro-colonial-blue-100: #dceaf6;
  --color-retro-colonial-blue-200: #c5d7e7;
  --color-retro-colonial-blue-300: #a4bbcd;
  --color-retro-colonial-blue-400: #87a2b7;
  --color-retro-colonial-blue-500: #6c8aa2;
  --color-retro-colonial-blue-600: #5b7589;
  --color-retro-colonial-blue-700: #495e6e;
  --color-retro-colonial-blue-800: #344551;
  --color-retro-colonial-blue-900: #243038;
  --color-retro-colonial-blue-950: #121c23;
}

SCSS

$retro-colonial-blue: #5a758a;
$retro-colonial-blue-rgb: 90, 117, 138;
$retro-colonial-blue-light: mix(#fff, $retro-colonial-blue, 20%);
$retro-colonial-blue-dark: mix(#000, $retro-colonial-blue, 20%);

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