#B6C8F8

CSS

:root {
  --sky-high: #b6c8f8;
  --sky-high-rgb: 182 200 248;
  --sky-high-oklch: oklch(0.836 0.07 268.8);
}

.element {
  color: var(--sky-high);
  background-color: hsl(224 83% 84%);
  border-color: oklch(0.836 0.07 268.8);
}

Tailwind CSS v4

@theme {
  --color-sky-high: #b6c8f8;
  --color-sky-high-50: #edf5ff;
  --color-sky-high-100: #dfe7ff;
  --color-sky-high-200: #c9d3f3;
  --color-sky-high-300: #aab6dc;
  --color-sky-high-400: #8d9dc9;
  --color-sky-high-500: #7384b5;
  --color-sky-high-600: #617099;
  --color-sky-high-700: #4e5a7b;
  --color-sky-high-800: #37425b;
  --color-sky-high-900: #262d40;
  --color-sky-high-950: #141a29;
}

SCSS

$sky-high: #b6c8f8;
$sky-high-rgb: 182, 200, 248;
$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);
}