#0076FF

CSS

:root {
  --hadfield-blue: #0076ff;
  --hadfield-blue-rgb: 0 118 255;
  --hadfield-blue-oklch: oklch(0.595 0.222 258.2);
}

.element {
  color: var(--hadfield-blue);
  background-color: hsl(212 100% 50%);
  border-color: oklch(0.595 0.222 258.2);
}

Tailwind CSS v4

@theme {
  --color-hadfield-blue: #0076ff;
  --color-hadfield-blue-50: #d1f7ff;
  --color-hadfield-blue-100: #bde9ff;
  --color-hadfield-blue-200: #9cd5ff;
  --color-hadfield-blue-300: #71b5ff;
  --color-hadfield-blue-400: #3e9aff;
  --color-hadfield-blue-500: #007bff;
  --color-hadfield-blue-600: #0069e9;
  --color-hadfield-blue-700: #0054bc;
  --color-hadfield-blue-800: #003e8c;
  --color-hadfield-blue-900: #002b64;
  --color-hadfield-blue-950: #001745;
}

SCSS

$hadfield-blue: #0076ff;
$hadfield-blue-rgb: 0, 118, 255;
$hadfield-blue-light: mix(#fff, $hadfield-blue, 20%);
$hadfield-blue-dark: mix(#000, $hadfield-blue, 20%);

.element {
  color: $hadfield-blue;
  box-shadow: 0 0 0 2px rgba($hadfield-blue, 0.35);
}