#B4C6EE

CSS

:root {
  --sky-high: #b4c6ee;
  --sky-high-rgb: 180 198 238;
  --sky-high-oklch: oklch(0.826 0.06 266);
}

.element {
  color: var(--sky-high);
  background-color: hsl(221 63% 82%);
  border-color: oklch(0.826 0.06 266);
}

Tailwind CSS v4

@theme {
  --color-sky-high: #b4c6ee;
  --color-sky-high-50: #eef5ff;
  --color-sky-high-100: #dfe8fd;
  --color-sky-high-200: #c9d4ef;
  --color-sky-high-300: #aab7d7;
  --color-sky-high-400: #8e9ec3;
  --color-sky-high-500: #7486af;
  --color-sky-high-600: #627193;
  --color-sky-high-700: #4e5a76;
  --color-sky-high-800: #384257;
  --color-sky-high-900: #262e3d;
  --color-sky-high-950: #151b27;
}

SCSS

$sky-high: #b4c6ee;
$sky-high-rgb: 180, 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);
}