#6D7583

CSS

:root {
  --abandoned-spaceship: #6d7583;
  --abandoned-spaceship-rgb: 109 117 131;
  --abandoned-spaceship-oklch: oklch(0.561 0.024 261.7);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(218 9% 47%);
  border-color: oklch(0.561 0.024 261.7);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #6d7583;
  --color-abandoned-spaceship-50: #f2f5fc;
  --color-abandoned-spaceship-100: #e4e8f0;
  --color-abandoned-spaceship-200: #cfd4df;
  --color-abandoned-spaceship-300: #b1b8c4;
  --color-abandoned-spaceship-400: #979fad;
  --color-abandoned-spaceship-500: #7e8796;
  --color-abandoned-spaceship-600: #6a727f;
  --color-abandoned-spaceship-700: #555b66;
  --color-abandoned-spaceship-800: #3e434b;
  --color-abandoned-spaceship-900: #2a2e34;
  --color-abandoned-spaceship-950: #181b1f;
}

SCSS

$abandoned-spaceship: #6d7583;
$abandoned-spaceship-rgb: 109, 117, 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);
}