#5569AB

CSS

:root {
  --loch-ness: #5569ab;
  --loch-ness-rgb: 85 105 171;
  --loch-ness-oklch: oklch(0.535 0.107 269.8);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(226 34% 50%);
  border-color: oklch(0.535 0.107 269.8);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5569ab;
  --color-loch-ness-50: #eaf4ff;
  --color-loch-ness-100: #dbe7ff;
  --color-loch-ness-200: #c4d2ff;
  --color-loch-ness-300: #a4b5ef;
  --color-loch-ness-400: #869bde;
  --color-loch-ness-500: #6a82cd;
  --color-loch-ness-600: #5a6ead;
  --color-loch-ness-700: #48588b;
  --color-loch-ness-800: #324067;
  --color-loch-ness-900: #222c49;
  --color-loch-ness-950: #111930;
}

SCSS

$loch-ness: #5569ab;
$loch-ness-rgb: 85, 105, 171;
$loch-ness-light: mix(#fff, $loch-ness, 20%);
$loch-ness-dark: mix(#000, $loch-ness, 20%);

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