#6F7485

CSS

:root {
  --abandoned-spaceship: #6f7485;
  --abandoned-spaceship-rgb: 111 116 133;
  --abandoned-spaceship-oklch: oklch(0.561 0.027 272.5);
}

.element {
  color: var(--abandoned-spaceship);
  background-color: hsl(226 9% 48%);
  border-color: oklch(0.561 0.027 272.5);
}

Tailwind CSS v4

@theme {
  --color-abandoned-spaceship: #6f7485;
  --color-abandoned-spaceship-50: #f3f5fd;
  --color-abandoned-spaceship-100: #e5e7f1;
  --color-abandoned-spaceship-200: #d0d4e0;
  --color-abandoned-spaceship-300: #b3b7c6;
  --color-abandoned-spaceship-400: #999eaf;
  --color-abandoned-spaceship-500: #808599;
  --color-abandoned-spaceship-600: #6c7181;
  --color-abandoned-spaceship-700: #565a67;
  --color-abandoned-spaceship-800: #3f424c;
  --color-abandoned-spaceship-900: #2b2e35;
  --color-abandoned-spaceship-950: #181a20;
}

SCSS

$abandoned-spaceship: #6f7485;
$abandoned-spaceship-rgb: 111, 116, 133;
$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);
}