#6C7786

CSS

:root {
  --abandoned-spaceship: #6c7786;
  --abandoned-spaceship-rgb: 108 119 134;
  --abandoned-spaceship-oklch: oklch(0.565 0.027 256.2);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(215 11% 47%);
  border-color: oklch(0.565 0.027 256.2);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #6c7786;
  --color-abandoned-spaceship-50: #f0f5fd;
  --color-abandoned-spaceship-100: #e2e8f1;
  --color-abandoned-spaceship-200: #cdd5e0;
  --color-abandoned-spaceship-300: #afb8c5;
  --color-abandoned-spaceship-400: #949fae;
  --color-abandoned-spaceship-500: #7b8798;
  --color-abandoned-spaceship-600: #687281;
  --color-abandoned-spaceship-700: #535c67;
  --color-abandoned-spaceship-800: #3c434c;
  --color-abandoned-spaceship-900: #292e35;
  --color-abandoned-spaceship-950: #171b20;
}

SCSS

$abandoned-spaceship: #6c7786;
$abandoned-spaceship-rgb: 108, 119, 134;
$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);
}