#727681

CSS

:root {
  --abandoned-spaceship: #727681;
  --abandoned-spaceship-rgb: 114 118 129;
  --abandoned-spaceship-oklch: oklch(0.566 0.018 269.8);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(224 6% 48%);
  border-color: oklch(0.566 0.018 269.8);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #727681;
  --color-abandoned-spaceship-50: #f3f5fa;
  --color-abandoned-spaceship-100: #e6e8ee;
  --color-abandoned-spaceship-200: #d1d4dc;
  --color-abandoned-spaceship-300: #b4b7c1;
  --color-abandoned-spaceship-400: #9a9ea9;
  --color-abandoned-spaceship-500: #818692;
  --color-abandoned-spaceship-600: #6e717c;
  --color-abandoned-spaceship-700: #585b63;
  --color-abandoned-spaceship-800: #404249;
  --color-abandoned-spaceship-900: #2c2e32;
  --color-abandoned-spaceship-950: #191b1e;
}

SCSS

$abandoned-spaceship: #727681;
$abandoned-spaceship-rgb: 114, 118, 129;
$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);
}