#6273A8

CSS

:root {
  --loch-ness: #6273a8;
  --loch-ness-rgb: 98 115 168;
  --loch-ness-oklch: oklch(0.564 0.085 269.9);
}

.element {
  color: var(--loch-ness);
  background-color: hsl(225 29% 52%);
  border-color: oklch(0.564 0.085 269.9);
}

Tailwind CSS v4

@theme {
  --color-loch-ness: #6273a8;
  --color-loch-ness-50: #ecf4ff;
  --color-loch-ness-100: #dee7ff;
  --color-loch-ness-200: #c7d3fa;
  --color-loch-ness-300: #a8b5e4;
  --color-loch-ness-400: #8b9cd1;
  --color-loch-ness-500: #7083bf;
  --color-loch-ness-600: #5f6fa1;
  --color-loch-ness-700: #4c5981;
  --color-loch-ness-800: #364160;
  --color-loch-ness-900: #252d43;
  --color-loch-ness-950: #131a2b;
}

SCSS

$loch-ness: #6273a8;
$loch-ness-rgb: 98, 115, 168;
$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);
}