#3EA1EC

CSS

:root {
  --fresh-blue-of-bel-air: #3ea1ec;
  --fresh-blue-of-bel-air-rgb: 62 161 236;
  --fresh-blue-of-bel-air-oklch: oklch(0.685 0.143 245.2);
}

.element {
  color: var(--fresh-blue-of-bel-air);
  background-color: hsl(206 82% 58%);
  border-color: oklch(0.685 0.143 245.2);
}

Tailwind CSS v4

@theme {
  --color-fresh-blue-of-bel-air: #3ea1ec;
  --color-fresh-blue-of-bel-air-50: #d5faff;
  --color-fresh-blue-of-bel-air-100: #c2edff;
  --color-fresh-blue-of-bel-air-200: #a2daff;
  --color-fresh-blue-of-bel-air-300: #79befd;
  --color-fresh-blue-of-bel-air-400: #4aa6ed;
  --color-fresh-blue-of-bel-air-500: #008cde;
  --color-fresh-blue-of-bel-air-600: #0a77bb;
  --color-fresh-blue-of-bel-air-700: #0a5f96;
  --color-fresh-blue-of-bel-air-800: #00466f;
  --color-fresh-blue-of-bel-air-900: #01314f;
  --color-fresh-blue-of-bel-air-950: #001d34;
}

SCSS

$fresh-blue-of-bel-air: #3ea1ec;
$fresh-blue-of-bel-air-rgb: 62, 161, 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);
}