Blue Nile

CSS

:root {
  --blue-nile: #779fb9;
  --blue-nile-rgb: 119 159 185;
  --blue-nile-oklch: oklch(0.683 0.058 237.2);
}

.element {
  color: var(--blue-nile);
  background-color: hsl(204 32% 60%);
  border-color: oklch(0.683 0.058 237.2);
}

Tailwind CSS v4

@theme {
  --color-blue-nile: #779fb9;
  --color-blue-nile-50: #e7f8ff;
  --color-blue-nile-100: #d7ebfa;
  --color-blue-nile-200: #bed8eb;
  --color-blue-nile-300: #9dbcd2;
  --color-blue-nile-400: #7ea4bd;
  --color-blue-nile-500: #618ca8;
  --color-blue-nile-600: #52778e;
  --color-blue-nile-700: #415f72;
  --color-blue-nile-800: #2e4654;
  --color-blue-nile-900: #1f303a;
  --color-blue-nile-950: #0f1c25;
}

SCSS

$blue-nile: #779fb9;
$blue-nile-rgb: 119, 159, 185;
$blue-nile-light: mix(#fff, $blue-nile, 20%);
$blue-nile-dark: mix(#000, $blue-nile, 20%);

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