#6772B2

CSS

:root {
  --loch-ness: #6772b2;
  --loch-ness-rgb: 103 114 178;
  --loch-ness-oklch: oklch(0.571 0.1 275.4);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(231 33% 55%);
  border-color: oklch(0.571 0.1 275.4);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #6772b2;
  --color-loch-ness-50: #eef3ff;
  --color-loch-ness-100: #dfe6ff;
  --color-loch-ness-200: #c9d1ff;
  --color-loch-ness-300: #aab3eb;
  --color-loch-ness-400: #8d9ad9;
  --color-loch-ness-500: #7480c8;
  --color-loch-ness-600: #626ca9;
  --color-loch-ness-700: #4e5787;
  --color-loch-ness-800: #374065;
  --color-loch-ness-900: #262c47;
  --color-loch-ness-950: #14192e;
}

SCSS

$loch-ness: #6772b2;
$loch-ness-rgb: 103, 114, 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);
}