#696DBE

CSS

:root {
  --loch-ness: #696dbe;
  --loch-ness-rgb: 105 109 190;
  --loch-ness-oklch: oklch(0.569 0.124 279.5);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(237 40% 58%);
  border-color: oklch(0.569 0.124 279.5);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #696dbe;
  --color-loch-ness-50: #eef2ff;
  --color-loch-ness-100: #e0e4ff;
  --color-loch-ness-200: #cbcfff;
  --color-loch-ness-300: #acb0f6;
  --color-loch-ness-400: #9096e6;
  --color-loch-ness-500: #777bd6;
  --color-loch-ness-600: #6468b5;
  --color-loch-ness-700: #505391;
  --color-loch-ness-800: #383d6c;
  --color-loch-ness-900: #272a4c;
  --color-loch-ness-950: #151732;
}

SCSS

$loch-ness: #696dbe;
$loch-ness-rgb: 105, 109, 190;
$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);
}