Depths of the Nile

CSS

:root {
  --depths-of-the-nile: #253f4e;
  --depths-of-the-nile-rgb: 37 63 78;
  --depths-of-the-nile-oklch: oklch(0.353 0.041 234.9);
}

.element {
  color: var(--depths-of-the-nile);
  background-color: hsl(202 36% 23%);
  border-color: oklch(0.353 0.041 234.9);
}

Tailwind CSS v4

@theme {
  --color-depths-of-the-nile: #253f4e;
  --color-depths-of-the-nile-50: #ebf7ff;
  --color-depths-of-the-nile-100: #dceaf4;
  --color-depths-of-the-nile-200: #c4d7e4;
  --color-depths-of-the-nile-300: #a4bbca;
  --color-depths-of-the-nile-400: #87a3b4;
  --color-depths-of-the-nile-500: #6c8b9e;
  --color-depths-of-the-nile-600: #5c7685;
  --color-depths-of-the-nile-700: #495e6b;
  --color-depths-of-the-nile-800: #34454e;
  --color-depths-of-the-nile-900: #243037;
  --color-depths-of-the-nile-950: #121c21;
}

SCSS

$depths-of-the-nile: #253f4e;
$depths-of-the-nile-rgb: 37, 63, 78;
$depths-of-the-nile-light: mix(#fff, $depths-of-the-nile, 20%);
$depths-of-the-nile-dark: mix(#000, $depths-of-the-nile, 20%);

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