#6F7489

CSS

:root {
  --abandoned-spaceship: #6f7489;
  --abandoned-spaceship-rgb: 111 116 137;
  --abandoned-spaceship-oklch: oklch(0.562 0.033 274.7);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(228 10% 49%);
  border-color: oklch(0.562 0.033 274.7);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #6f7489;
  --color-abandoned-spaceship-50: #f2f4ff;
  --color-abandoned-spaceship-100: #e5e7f3;
  --color-abandoned-spaceship-200: #d0d3e3;
  --color-abandoned-spaceship-300: #b3b6c9;
  --color-abandoned-spaceship-400: #989db2;
  --color-abandoned-spaceship-500: #7f859d;
  --color-abandoned-spaceship-600: #6c7184;
  --color-abandoned-spaceship-700: #565a6a;
  --color-abandoned-spaceship-800: #3e424e;
  --color-abandoned-spaceship-900: #2b2d36;
  --color-abandoned-spaceship-950: #181a21;
}

SCSS

$abandoned-spaceship: #6f7489;
$abandoned-spaceship-rgb: 111, 116, 137;
$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);
}