#45A0EC

CSS

:root {
  --fresh-blue-of-bel-air: #45a0ec;
  --fresh-blue-of-bel-air-rgb: 69 160 236;
  --fresh-blue-of-bel-air-oklch: oklch(0.685 0.142 247.1);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(207 81% 60%);
  border-color: oklch(0.685 0.142 247.1);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #45a0ec;
  --color-fresh-blue-of-bel-air-50: #d7f9ff;
  --color-fresh-blue-of-bel-air-100: #c4edff;
  --color-fresh-blue-of-bel-air-200: #a5daff;
  --color-fresh-blue-of-bel-air-300: #7cbdfd;
  --color-fresh-blue-of-bel-air-400: #50a5ed;
  --color-fresh-blue-of-bel-air-500: #188bde;
  --color-fresh-blue-of-bel-air-600: #1976bb;
  --color-fresh-blue-of-bel-air-700: #155f96;
  --color-fresh-blue-of-bel-air-800: #064670;
  --color-fresh-blue-of-bel-air-900: #05304f;
  --color-fresh-blue-of-bel-air-950: #001c34;
}

SCSS

$fresh-blue-of-bel-air: #45a0ec;
$fresh-blue-of-bel-air-rgb: 69, 160, 236;
$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);
}