#6A71B7

CSS

:root {
  --loch-ness: #6a71b7;
  --loch-ness-rgb: 106 113 183;
  --loch-ness-oklch: oklch(0.573 0.108 278.1);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(235 35% 57%);
  border-color: oklch(0.573 0.108 278.1);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #6a71b7;
  --color-loch-ness-50: #eef3ff;
  --color-loch-ness-100: #e0e5ff;
  --color-loch-ness-200: #cbd0ff;
  --color-loch-ness-300: #acb2ee;
  --color-loch-ness-400: #9098dd;
  --color-loch-ness-500: #767ecc;
  --color-loch-ness-600: #646bac;
  --color-loch-ness-700: #50558a;
  --color-loch-ness-800: #383f67;
  --color-loch-ness-900: #272b49;
  --color-loch-ness-950: #151830;
}

SCSS

$loch-ness: #6a71b7;
$loch-ness-rgb: 106, 113, 183;
$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);
}