#5C72B2

CSS

:root {
  --loch-ness: #5c72b2;
  --loch-ness-rgb: 92 114 178;
  --loch-ness-oklch: oklch(0.563 0.103 268.6);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(225 36% 53%);
  border-color: oklch(0.563 0.103 268.6);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5c72b2;
  --color-loch-ness-50: #eaf4ff;
  --color-loch-ness-100: #dbe7ff;
  --color-loch-ness-200: #c3d3ff;
  --color-loch-ness-300: #a3b5ed;
  --color-loch-ness-400: #859cdc;
  --color-loch-ness-500: #6a82cb;
  --color-loch-ness-600: #5a6fab;
  --color-loch-ness-700: #475889;
  --color-loch-ness-800: #324166;
  --color-loch-ness-900: #222d48;
  --color-loch-ness-950: #111a2f;
}

SCSS

$loch-ness: #5c72b2;
$loch-ness-rgb: 92, 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);
}