#676FB7

CSS

:root {
  --loch-ness: #676fb7;
  --loch-ness-rgb: 103 111 183;
  --loch-ness-oklch: oklch(0.567 0.111 277.4);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(234 36% 56%);
  border-color: oklch(0.567 0.111 277.4);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #676fb7;
  --color-loch-ness-50: #eef3ff;
  --color-loch-ness-100: #dfe5ff;
  --color-loch-ness-200: #cad0ff;
  --color-loch-ness-300: #abb2f0;
  --color-loch-ness-400: #8e98e0;
  --color-loch-ness-500: #757ecf;
  --color-loch-ness-600: #636bae;
  --color-loch-ness-700: #4f558c;
  --color-loch-ness-800: #383e68;
  --color-loch-ness-900: #262b49;
  --color-loch-ness-950: #151830;
}

SCSS

$loch-ness: #676fb7;
$loch-ness-rgb: 103, 111, 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);
}