Copen Blue

CSS

:root {
  --copen-blue: #57748d;
  --copen-blue-rgb: 87 116 141;
  --copen-blue-oklch: oklch(0.546 0.052 245);
}

.element {
  color: var(--copen-blue);
  background-color: hsl(208 24% 45%);
  border-color: oklch(0.546 0.052 245);
}

Tailwind CSS v4

@theme {
  --color-copen-blue: #57748d;
  --color-copen-blue-50: #eaf7ff;
  --color-copen-blue-100: #dbeaf9;
  --color-copen-blue-200: #c3d7ea;
  --color-copen-blue-300: #a3bbd1;
  --color-copen-blue-400: #85a2bb;
  --color-copen-blue-500: #698aa7;
  --color-copen-blue-600: #59758d;
  --color-copen-blue-700: #475e71;
  --color-copen-blue-800: #334553;
  --color-copen-blue-900: #232f3a;
  --color-copen-blue-950: #121c24;
}

SCSS

$copen-blue: #57748d;
$copen-blue-rgb: 87, 116, 141;
$copen-blue-light: mix(#fff, $copen-blue, 20%);
$copen-blue-dark: mix(#000, $copen-blue, 20%);

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