#696FC0

CSS

:root {
  --loch-ness: #696fc0;
  --loch-ness-rgb: 105 111 192;
  --loch-ness-oklch: oklch(0.574 0.124 278.5);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(236 41% 58%);
  border-color: oklch(0.574 0.124 278.5);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #696fc0;
  --color-loch-ness-50: #eef2ff;
  --color-loch-ness-100: #dfe4ff;
  --color-loch-ness-200: #cacfff;
  --color-loch-ness-300: #abb0f6;
  --color-loch-ness-400: #8e96e6;
  --color-loch-ness-500: #757bd6;
  --color-loch-ness-600: #6369b5;
  --color-loch-ness-700: #4f5491;
  --color-loch-ness-800: #383d6d;
  --color-loch-ness-900: #262a4c;
  --color-loch-ness-950: #151733;
}

SCSS

$loch-ness: #696fc0;
$loch-ness-rgb: 105, 111, 192;
$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);
}