#479FF0

CSS

:root {
  --fresh-blue-of-bel-air: #479ff0;
  --fresh-blue-of-bel-air-rgb: 71 159 240;
  --fresh-blue-of-bel-air-oklch: oklch(0.686 0.146 249.2);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(209 85% 61%);
  border-color: oklch(0.686 0.146 249.2);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #479ff0;
  --color-fresh-blue-of-bel-air-50: #d7f9ff;
  --color-fresh-blue-of-bel-air-100: #c4ecff;
  --color-fresh-blue-of-bel-air-200: #a6d9ff;
  --color-fresh-blue-of-bel-air-300: #7dbcff;
  --color-fresh-blue-of-bel-air-400: #52a4f1;
  --color-fresh-blue-of-bel-air-500: #1d8ae2;
  --color-fresh-blue-of-bel-air-600: #1d75be;
  --color-fresh-blue-of-bel-air-700: #175e99;
  --color-fresh-blue-of-bel-air-800: #084572;
  --color-fresh-blue-of-bel-air-900: #063050;
  --color-fresh-blue-of-bel-air-950: #001c35;
}

SCSS

$fresh-blue-of-bel-air: #479ff0;
$fresh-blue-of-bel-air-rgb: 71, 159, 240;
$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);
}