#43A1E7

CSS

:root {
  --fresh-blue-of-bel-air: #43a1e7;
  --fresh-blue-of-bel-air-rgb: 67 161 231;
  --fresh-blue-of-bel-air-oklch: oklch(0.684 0.136 244.4);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(206 77% 58%);
  border-color: oklch(0.684 0.136 244.4);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #43a1e7;
  --color-fresh-blue-of-bel-air-50: #d6faff;
  --color-fresh-blue-of-bel-air-100: #c4edff;
  --color-fresh-blue-of-bel-air-200: #a5dbff;
  --color-fresh-blue-of-bel-air-300: #7bbef9;
  --color-fresh-blue-of-bel-air-400: #4fa6e9;
  --color-fresh-blue-of-bel-air-500: #128dd9;
  --color-fresh-blue-of-bel-air-600: #1677b7;
  --color-fresh-blue-of-bel-air-700: #126093;
  --color-fresh-blue-of-bel-air-800: #04476d;
  --color-fresh-blue-of-bel-air-900: #04314d;
  --color-fresh-blue-of-bel-air-950: #001d33;
}

SCSS

$fresh-blue-of-bel-air: #43a1e7;
$fresh-blue-of-bel-air-rgb: 67, 161, 231;
$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);
}