#717683

CSS

:root {
  --abandoned-spaceship: #717683;
  --abandoned-spaceship-rgb: 113 118 131;
  --abandoned-spaceship-oklch: oklch(0.566 0.021 268.9);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(223 7% 48%);
  border-color: oklch(0.566 0.021 268.9);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #717683;
  --color-abandoned-spaceship-50: #f3f5fb;
  --color-abandoned-spaceship-100: #e5e8ef;
  --color-abandoned-spaceship-200: #d1d4dd;
  --color-abandoned-spaceship-300: #b3b7c2;
  --color-abandoned-spaceship-400: #999eab;
  --color-abandoned-spaceship-500: #808695;
  --color-abandoned-spaceship-600: #6d717e;
  --color-abandoned-spaceship-700: #575b65;
  --color-abandoned-spaceship-800: #3f424a;
  --color-abandoned-spaceship-900: #2b2e33;
  --color-abandoned-spaceship-950: #191b1f;
}

SCSS

$abandoned-spaceship: #717683;
$abandoned-spaceship-rgb: 113, 118, 131;
$abandoned-spaceship-light: mix(#fff, $abandoned-spaceship, 20%);
$abandoned-spaceship-dark: mix(#000, $abandoned-spaceship, 20%);

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