#0097FF

CSS

:root {
  --fresh-blue-of-bel-air: #0097ff;
  --fresh-blue-of-bel-air-rgb: 0 151 255;
  --fresh-blue-of-bel-air-oklch: oklch(0.665 0.186 249.5);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(204 100% 50%);
  border-color: oklch(0.665 0.186 249.5);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #0097ff;
  --color-fresh-blue-of-bel-air-50: #cffaff;
  --color-fresh-blue-of-bel-air-100: #baedff;
  --color-fresh-blue-of-bel-air-200: #98daff;
  --color-fresh-blue-of-bel-air-300: #6abcff;
  --color-fresh-blue-of-bel-air-400: #2ea3ff;
  --color-fresh-blue-of-bel-air-500: #0088fa;
  --color-fresh-blue-of-bel-air-600: #0073d2;
  --color-fresh-blue-of-bel-air-700: #005ca9;
  --color-fresh-blue-of-bel-air-800: #00447e;
  --color-fresh-blue-of-bel-air-900: #002f59;
  --color-fresh-blue-of-bel-air-950: #001b3d;
}

SCSS

$fresh-blue-of-bel-air: #0097ff;
$fresh-blue-of-bel-air-rgb: 0, 151, 255;
$fresh-blue-of-bel-air-light: mix(#fff, $fresh-blue-of-bel-air, 20%);
$fresh-blue-of-bel-air-dark: mix(#000, $fresh-blue-of-bel-air, 20%);

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