#656CC8

CSS

:root {
  --loch-ness: #656cc8;
  --loch-ness-rgb: 101 108 200;
  --loch-ness-oklch: oklch(0.57 0.14 277.7);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(236 47% 59%);
  border-color: oklch(0.57 0.14 277.7);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #656cc8;
  --color-loch-ness-50: #ecf2ff;
  --color-loch-ness-100: #dee4ff;
  --color-loch-ness-200: #c8ceff;
  --color-loch-ness-300: #a9affe;
  --color-loch-ness-400: #8b95f0;
  --color-loch-ness-500: #7279e1;
  --color-loch-ness-600: #6067be;
  --color-loch-ness-700: #4d5298;
  --color-loch-ness-800: #363c72;
  --color-loch-ness-900: #242a50;
  --color-loch-ness-950: #131736;
}

SCSS

$loch-ness: #656cc8;
$loch-ness-rgb: 101, 108, 200;
$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);
}