#696CC2

CSS

:root {
  --loch-ness: #696cc2;
  --loch-ness-rgb: 105 108 194;
  --loch-ness-oklch: oklch(0.569 0.131 279.9);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(238 42% 59%);
  border-color: oklch(0.569 0.131 279.9);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #696cc2;
  --color-loch-ness-50: #eef1ff;
  --color-loch-ness-100: #e0e3ff;
  --color-loch-ness-200: #cbceff;
  --color-loch-ness-300: #acaff9;
  --color-loch-ness-400: #8f95ea;
  --color-loch-ness-500: #767ada;
  --color-loch-ness-600: #6467b8;
  --color-loch-ness-700: #505394;
  --color-loch-ness-800: #383d6f;
  --color-loch-ness-900: #262a4e;
  --color-loch-ness-950: #151734;
}

SCSS

$loch-ness: #696cc2;
$loch-ness-rgb: 105, 108, 194;
$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);
}