#6F768B

CSS

:root {
  --abandoned-spaceship: #6f768b;
  --abandoned-spaceship-rgb: 111 118 139;
  --abandoned-spaceship-oklch: oklch(0.567 0.034 270.8);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(225 11% 49%);
  border-color: oklch(0.567 0.034 270.8);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #6f768b;
  --color-abandoned-spaceship-50: #f2f5ff;
  --color-abandoned-spaceship-100: #e4e7f3;
  --color-abandoned-spaceship-200: #cfd4e3;
  --color-abandoned-spaceship-300: #b1b7c9;
  --color-abandoned-spaceship-400: #979eb3;
  --color-abandoned-spaceship-500: #7e859d;
  --color-abandoned-spaceship-600: #6a7185;
  --color-abandoned-spaceship-700: #555a6a;
  --color-abandoned-spaceship-800: #3d424e;
  --color-abandoned-spaceship-900: #2a2e36;
  --color-abandoned-spaceship-950: #181a21;
}

SCSS

$abandoned-spaceship: #6f768b;
$abandoned-spaceship-rgb: 111, 118, 139;
$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);
}