#369DF9

CSS

:root {
  --fresh-blue-of-bel-air: #369df9;
  --fresh-blue-of-bel-air-rgb: 54 157 249;
  --fresh-blue-of-bel-air-oklch: oklch(0.681 0.164 249.7);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(208 94% 59%);
  border-color: oklch(0.681 0.164 249.7);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #369df9;
  --color-fresh-blue-of-bel-air-50: #d4f9ff;
  --color-fresh-blue-of-bel-air-100: #c0ecff;
  --color-fresh-blue-of-bel-air-200: #a0d9ff;
  --color-fresh-blue-of-bel-air-300: #75bcff;
  --color-fresh-blue-of-bel-air-400: #45a3fb;
  --color-fresh-blue-of-bel-air-500: #0089ed;
  --color-fresh-blue-of-bel-air-600: #0074c8;
  --color-fresh-blue-of-bel-air-700: #015da1;
  --color-fresh-blue-of-bel-air-800: #004578;
  --color-fresh-blue-of-bel-air-900: #003054;
  --color-fresh-blue-of-bel-air-950: #001b39;
}

SCSS

$fresh-blue-of-bel-air: #369df9;
$fresh-blue-of-bel-air-rgb: 54, 157, 249;
$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);
}