#89C3DA

CSS

:root {
  --sky-fall: #89c3da;
  --sky-fall-rgb: 137 195 218;
  --sky-fall-oklch: oklch(0.785 0.068 224.6);
}

.element {
  color: var(--sky-fall);
  background-color: hsl(197 52% 70%);
  border-color: oklch(0.785 0.068 224.6);
}

Tailwind CSS v4

@theme {
  --color-sky-fall: #89c3da;
  --color-sky-fall-50: #e2faff;
  --color-sky-fall-100: #d1edfa;
  --color-sky-fall-200: #b7dbeb;
  --color-sky-fall-300: #93bfd3;
  --color-sky-fall-400: #71a7bd;
  --color-sky-fall-500: #5090a8;
  --color-sky-fall-600: #457a8e;
  --color-sky-fall-700: #376172;
  --color-sky-fall-800: #264853;
  --color-sky-fall-900: #19323a;
  --color-sky-fall-950: #0a1e24;
}

SCSS

$sky-fall: #89c3da;
$sky-fall-rgb: 137, 195, 218;
$sky-fall-light: mix(#fff, $sky-fall, 20%);
$sky-fall-dark: mix(#000, $sky-fall, 20%);

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