#5570BF

CSS

:root {
  --loch-ness: #5570bf;
  --loch-ness-rgb: 85 112 191;
  --loch-ness-oklch: oklch(0.562 0.127 268);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(225 45% 54%);
  border-color: oklch(0.562 0.127 268);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #5570bf;
  --color-loch-ness-50: #e7f4ff;
  --color-loch-ness-100: #d7e7ff;
  --color-loch-ness-200: #bfd2ff;
  --color-loch-ness-300: #9eb4f9;
  --color-loch-ness-400: #7e9be9;
  --color-loch-ness-500: #6281da;
  --color-loch-ness-600: #536db8;
  --color-loch-ness-700: #425794;
  --color-loch-ness-800: #2e406e;
  --color-loch-ness-900: #1f2c4d;
  --color-loch-ness-950: #0f1933;
}

SCSS

$loch-ness: #5570bf;
$loch-ness-rgb: 85, 112, 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);
}