#ADE9F4

CSS

:root {
  --blizzard-blue: #ade9f4;
  --blizzard-blue-rgb: 173 233 244;
  --blizzard-blue-oklch: oklch(0.897 0.062 210.1);
}

.element {
  color: var(--blizzard-blue);
  background-color: hsl(189 76% 82%);
  border-color: oklch(0.897 0.062 210.1);
}

Tailwind CSS v4

@theme {
  --color-blizzard-blue: #ade9f4;
  --color-blizzard-blue-50: #e2faff;
  --color-blizzard-blue-100: #d1eef4;
  --color-blizzard-blue-200: #b7dce4;
  --color-blizzard-blue-300: #93c0ca;
  --color-blizzard-blue-400: #72a9b3;
  --color-blizzard-blue-500: #51929d;
  --color-blizzard-blue-600: #457b85;
  --color-blizzard-blue-700: #37636a;
  --color-blizzard-blue-800: #27494e;
  --color-blizzard-blue-900: #1a3236;
  --color-blizzard-blue-950: #0a1e21;
}

SCSS

$blizzard-blue: #ade9f4;
$blizzard-blue-rgb: 173, 233, 244;
$blizzard-blue-light: mix(#fff, $blizzard-blue, 20%);
$blizzard-blue-dark: mix(#000, $blizzard-blue, 20%);

.element {
  color: $blizzard-blue;
  box-shadow: 0 0 0 2px rgba($blizzard-blue, 0.35);
}