#5E6FBF

CSS

:root {
  --loch-ness: #5e6fbf;
  --loch-ness-rgb: 94 111 191;
  --loch-ness-oklch: oklch(0.565 0.125 272.8);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(229 43% 56%);
  border-color: oklch(0.565 0.125 272.8);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5e6fbf;
  --color-loch-ness-50: #eaf3ff;
  --color-loch-ness-100: #dbe6ff;
  --color-loch-ness-200: #c4d1ff;
  --color-loch-ness-300: #a4b3f8;
  --color-loch-ness-400: #8699e8;
  --color-loch-ness-500: #6b7ed8;
  --color-loch-ness-600: #5b6bb6;
  --color-loch-ness-700: #485693;
  --color-loch-ness-800: #323f6d;
  --color-loch-ness-900: #222b4d;
  --color-loch-ness-950: #121833;
}

SCSS

$loch-ness: #5e6fbf;
$loch-ness-rgb: 94, 111, 191;
$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);
}