#6071B2

CSS

:root {
  --loch-ness: #6071b2;
  --loch-ness-rgb: 96 113 178;
  --loch-ness-oklch: oklch(0.564 0.103 271.6);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(228 35% 54%);
  border-color: oklch(0.564 0.103 271.6);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #6071b2;
  --color-loch-ness-50: #ebf4ff;
  --color-loch-ness-100: #dce6ff;
  --color-loch-ness-200: #c6d2ff;
  --color-loch-ness-300: #a6b4ed;
  --color-loch-ness-400: #899bdc;
  --color-loch-ness-500: #6e81ca;
  --color-loch-ness-600: #5d6dab;
  --color-loch-ness-700: #4a5789;
  --color-loch-ness-800: #344066;
  --color-loch-ness-900: #242c48;
  --color-loch-ness-950: #13192f;
}

SCSS

$loch-ness: #6071b2;
$loch-ness-rgb: 96, 113, 178;
$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);
}