#757583

CSS

:root {
  --abandoned-spaceship: #757583;
  --abandoned-spaceship-rgb: 117 117 131;
  --abandoned-spaceship-oklch: oklch(0.567 0.021 285.7);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(240 6% 49%);
  border-color: oklch(0.567 0.021 285.7);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #757583;
  --color-abandoned-spaceship-50: #f4f4fb;
  --color-abandoned-spaceship-100: #e7e7ef;
  --color-abandoned-spaceship-200: #d3d3dd;
  --color-abandoned-spaceship-300: #b6b6c2;
  --color-abandoned-spaceship-400: #9d9dab;
  --color-abandoned-spaceship-500: #848494;
  --color-abandoned-spaceship-600: #70707d;
  --color-abandoned-spaceship-700: #5a5a64;
  --color-abandoned-spaceship-800: #41424a;
  --color-abandoned-spaceship-900: #2d2d33;
  --color-abandoned-spaceship-950: #1a1a1f;
}

SCSS

$abandoned-spaceship: #757583;
$abandoned-spaceship-rgb: 117, 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);
}