#616FBE

CSS

:root {
  --loch-ness: #616fbe;
  --loch-ness-rgb: 97 111 190;
  --loch-ness-oklch: oklch(0.567 0.123 274.2);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(231 42% 56%);
  border-color: oklch(0.567 0.123 274.2);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #616fbe;
  --color-loch-ness-50: #ebf3ff;
  --color-loch-ness-100: #dce5ff;
  --color-loch-ness-200: #c6d0ff;
  --color-loch-ness-300: #a6b2f6;
  --color-loch-ness-400: #8898e7;
  --color-loch-ness-500: #6e7ed7;
  --color-loch-ness-600: #5d6bb5;
  --color-loch-ness-700: #4a5591;
  --color-loch-ness-800: #343f6d;
  --color-loch-ness-900: #232b4c;
  --color-loch-ness-950: #121833;
}

SCSS

$loch-ness: #616fbe;
$loch-ness-rgb: 97, 111, 190;
$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);
}