#5B73AD

CSS

:root {
  --loch-ness: #5b73ad;
  --loch-ness-rgb: 91 115 173;
  --loch-ness-oklch: oklch(0.562 0.095 266.3);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(222 33% 52%);
  border-color: oklch(0.562 0.095 266.3);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5b73ad;
  --color-loch-ness-50: #e9f5ff;
  --color-loch-ness-100: #dae8ff;
  --color-loch-ness-200: #c3d4fe;
  --color-loch-ness-300: #a3b6e9;
  --color-loch-ness-400: #849dd7;
  --color-loch-ness-500: #6984c5;
  --color-loch-ness-600: #5970a7;
  --color-loch-ness-700: #475986;
  --color-loch-ness-800: #324263;
  --color-loch-ness-900: #222d46;
  --color-loch-ness-950: #111a2d;
}

SCSS

$loch-ness: #5b73ad;
$loch-ness-rgb: 91, 115, 173;
$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);
}