#606DC6

CSS

:root {
  --loch-ness: #606dc6;
  --loch-ness-rgb: 96 109 198;
  --loch-ness-oklch: oklch(0.567 0.137 274.9);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(232 47% 58%);
  border-color: oklch(0.567 0.137 274.9);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #606dc6;
  --color-loch-ness-50: #eaf2ff;
  --color-loch-ness-100: #dce5ff;
  --color-loch-ness-200: #c5d0ff;
  --color-loch-ness-300: #a5b1fd;
  --color-loch-ness-400: #8797ef;
  --color-loch-ness-500: #6d7be0;
  --color-loch-ness-600: #5c69bd;
  --color-loch-ness-700: #4a5498;
  --color-loch-ness-800: #333e71;
  --color-loch-ness-900: #232a50;
  --color-loch-ness-950: #121735;
}

SCSS

$loch-ness: #606dc6;
$loch-ness-rgb: 96, 109, 198;
$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);
}