#351F59

CSS

:root {
  --fabric-of-space: #351f59;
  --fabric-of-space-rgb: 53 31 89;
  --fabric-of-space-oklch: oklch(0.301 0.1 297.5);
}

.element {
  color: var(--fabric-of-space);
  background-color: hsl(263 48% 24%);
  border-color: oklch(0.301 0.1 297.5);
}

Tailwind CSS v4

@theme {
  --color-fabric-of-space: #351f59;
  --color-fabric-of-space-50: #f9efff;
  --color-fabric-of-space-100: #ece1ff;
  --color-fabric-of-space-200: #dacbfa;
  --color-fabric-of-space-300: #bface4;
  --color-fabric-of-space-400: #a592d2;
  --color-fabric-of-space-500: #8e77c0;
  --color-fabric-of-space-600: #7865a2;
  --color-fabric-of-space-700: #605182;
  --color-fabric-of-space-800: #453b61;
  --color-fabric-of-space-900: #302844;
  --color-fabric-of-space-950: #1c162c;
}

SCSS

$fabric-of-space: #351f59;
$fabric-of-space-rgb: 53, 31, 89;
$fabric-of-space-light: mix(#fff, $fabric-of-space, 20%);
$fabric-of-space-dark: mix(#000, $fabric-of-space, 20%);

.element {
  color: $fabric-of-space;
  box-shadow: 0 0 0 2px rgba($fabric-of-space, 0.35);
}