#073253

CSS

:root {
  --beyond-the-stars: #073253;
  --beyond-the-stars-rgb: 7 50 83;
  --beyond-the-stars-oklch: oklch(0.308 0.074 247.2);
}

.element {
  color: var(--beyond-the-stars);
  background-color: hsl(206 84% 18%);
  border-color: oklch(0.308 0.074 247.2);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-stars: #073253;
  --color-beyond-the-stars-50: #e5f8ff;
  --color-beyond-the-stars-100: #d6ebff;
  --color-beyond-the-stars-200: #bdd8f3;
  --color-beyond-the-stars-300: #9bbbdc;
  --color-beyond-the-stars-400: #7ba3c9;
  --color-beyond-the-stars-500: #5d8bb5;
  --color-beyond-the-stars-600: #4f7599;
  --color-beyond-the-stars-700: #3f5e7b;
  --color-beyond-the-stars-800: #2c455b;
  --color-beyond-the-stars-900: #1e303f;
  --color-beyond-the-stars-950: #0d1c28;
}

SCSS

$beyond-the-stars: #073253;
$beyond-the-stars-rgb: 7, 50, 83;
$beyond-the-stars-light: mix(#fff, $beyond-the-stars, 20%);
$beyond-the-stars-dark: mix(#000, $beyond-the-stars, 20%);

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