#93ABE2

CSS

:root {
  --old-world: #93abe2;
  --old-world-rgb: 147 171 226;
  --old-world-oklch: oklch(0.743 0.084 266.1);
}

.element {
  color: var(--old-world);
  background-color: hsl(222 58% 73%);
  border-color: oklch(0.743 0.084 266.1);
}

Tailwind CSS v4

@theme {
  --color-old-world: #93abe2;
  --color-old-world-50: #ebf5ff;
  --color-old-world-100: #dce8ff;
  --color-old-world-200: #c5d4f9;
  --color-old-world-300: #a5b6e4;
  --color-old-world-400: #879ed1;
  --color-old-world-500: #6c85bf;
  --color-old-world-600: #5c70a1;
  --color-old-world-700: #495a81;
  --color-old-world-800: #334260;
  --color-old-world-900: #232e43;
  --color-old-world-950: #121a2b;
}

SCSS

$old-world: #93abe2;
$old-world-rgb: 147, 171, 226;
$old-world-light: mix(#fff, $old-world, 20%);
$old-world-dark: mix(#000, $old-world, 20%);

.element {
  color: $old-world;
  box-shadow: 0 0 0 2px rgba($old-world, 0.35);
}