#2C9FFE

CSS

:root {
  --fresh-blue-of-bel-air: #2c9ffe;
  --fresh-blue-of-bel-air-rgb: 44 159 254;
  --fresh-blue-of-bel-air-oklch: oklch(0.687 0.171 248.9);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(207 99% 58%);
  border-color: oklch(0.687 0.171 248.9);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #2c9ffe;
  --color-fresh-blue-of-bel-air-50: #d1faff;
  --color-fresh-blue-of-bel-air-100: #beedff;
  --color-fresh-blue-of-bel-air-200: #9cdaff;
  --color-fresh-blue-of-bel-air-300: #71bcff;
  --color-fresh-blue-of-bel-air-400: #3ca4fe;
  --color-fresh-blue-of-bel-air-500: #0089f0;
  --color-fresh-blue-of-bel-air-600: #0074cb;
  --color-fresh-blue-of-bel-air-700: #005da3;
  --color-fresh-blue-of-bel-air-800: #004579;
  --color-fresh-blue-of-bel-air-900: #003056;
  --color-fresh-blue-of-bel-air-950: #001b3a;
}

SCSS

$fresh-blue-of-bel-air: #2c9ffe;
$fresh-blue-of-bel-air-rgb: 44, 159, 254;
$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);
}