#6A6DBA

CSS

:root {
  --loch-ness: #6a6dba;
  --loch-ness-rgb: 106 109 186;
  --loch-ness-oklch: oklch(0.567 0.118 280.3);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(238 37% 57%);
  border-color: oklch(0.567 0.118 280.3);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #6a6dba;
  --color-loch-ness-50: #eff2ff;
  --color-loch-ness-100: #e1e4ff;
  --color-loch-ness-200: #cccfff;
  --color-loch-ness-300: #aeb0f2;
  --color-loch-ness-400: #9196e3;
  --color-loch-ness-500: #787bd2;
  --color-loch-ness-600: #6669b1;
  --color-loch-ness-700: #51548e;
  --color-loch-ness-800: #393d6a;
  --color-loch-ness-900: #272a4b;
  --color-loch-ness-950: #161731;
}

SCSS

$loch-ness: #6a6dba;
$loch-ness-rgb: 106, 109, 186;
$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);
}