#5269B1

CSS

:root {
  --loch-ness: #5269b1;
  --loch-ness-rgb: 82 105 177;
  --loch-ness-oklch: oklch(0.537 0.116 268.9);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(225 38% 51%);
  border-color: oklch(0.537 0.116 268.9);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5269b1;
  --color-loch-ness-50: #e8f4ff;
  --color-loch-ness-100: #d9e7ff;
  --color-loch-ness-200: #c1d2ff;
  --color-loch-ness-300: #a1b5f4;
  --color-loch-ness-400: #829be4;
  --color-loch-ness-500: #6781d3;
  --color-loch-ness-600: #576db2;
  --color-loch-ness-700: #45588f;
  --color-loch-ness-800: #30406b;
  --color-loch-ness-900: #212c4b;
  --color-loch-ness-950: #101931;
}

SCSS

$loch-ness: #5269b1;
$loch-ness-rgb: 82, 105, 177;
$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);
}