#5970C1

CSS

:root {
  --loch-ness: #5970c1;
  --loch-ness-rgb: 89 112 193;
  --loch-ness-oklch: oklch(0.565 0.128 270);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(227 46% 55%);
  border-color: oklch(0.565 0.128 270);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5970c1;
  --color-loch-ness-50: #e8f4ff;
  --color-loch-ness-100: #d8e6ff;
  --color-loch-ness-200: #c1d2ff;
  --color-loch-ness-300: #a0b4f9;
  --color-loch-ness-400: #819aea;
  --color-loch-ness-500: #657fdb;
  --color-loch-ness-600: #566cb8;
  --color-loch-ness-700: #455694;
  --color-loch-ness-800: #2f3f6f;
  --color-loch-ness-900: #202c4e;
  --color-loch-ness-950: #101934;
}

SCSS

$loch-ness: #5970c1;
$loch-ness-rgb: 89, 112, 193;
$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);
}