#6670B0

CSS

:root {
  --loch-ness: #6670b0;
  --loch-ness-rgb: 102 112 176;
  --loch-ness-oklch: oklch(0.565 0.1 276);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(232 32% 55%);
  border-color: oklch(0.565 0.1 276);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #6670b0;
  --color-loch-ness-50: #eef3ff;
  --color-loch-ness-100: #dfe5ff;
  --color-loch-ness-200: #cad1ff;
  --color-loch-ness-300: #abb3ea;
  --color-loch-ness-400: #8e99d9;
  --color-loch-ness-500: #7480c8;
  --color-loch-ness-600: #636ca9;
  --color-loch-ness-700: #4f5687;
  --color-loch-ness-800: #383f65;
  --color-loch-ness-900: #262c47;
  --color-loch-ness-950: #15192e;
}

SCSS

$loch-ness: #6670b0;
$loch-ness-rgb: 102, 112, 176;
$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);
}