#A9C6EE

CSS

:root {
  --sky-high: #a9c6ee;
  --sky-high-rgb: 169 198 238;
  --sky-high-oklch: oklch(0.819 0.065 256.5);
}

.element {
  color: var(--sky-high);
  background-color: hsl(215 67% 80%);
  border-color: oklch(0.819 0.065 256.5);
}

Tailwind CSS v4

@theme {
  --color-sky-high: #a9c6ee;
  --color-sky-high-50: #eaf6ff;
  --color-sky-high-100: #dbe9fe;
  --color-sky-high-200: #c4d6f1;
  --color-sky-high-300: #a4b9d9;
  --color-sky-high-400: #86a0c5;
  --color-sky-high-500: #6a88b1;
  --color-sky-high-600: #5a7396;
  --color-sky-high-700: #485c78;
  --color-sky-high-800: #334459;
  --color-sky-high-900: #232f3e;
  --color-sky-high-950: #121b27;
}

SCSS

$sky-high: #a9c6ee;
$sky-high-rgb: 169, 198, 238;
$sky-high-light: mix(#fff, $sky-high, 20%);
$sky-high-dark: mix(#000, $sky-high, 20%);

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