#87C6FF

CSS

:root {
  --clear-sky: #87c6ff;
  --clear-sky-rgb: 135 198 255;
  --clear-sky-oklch: oklch(0.805 0.104 246.8);
}

.element {
  color: var(--clear-sky);
  background-color: hsl(209 100% 76%);
  border-color: oklch(0.805 0.104 246.8);
}

Tailwind CSS v4

@theme {
  --color-clear-sky: #87c6ff;
  --color-clear-sky-50: #dff8ff;
  --color-clear-sky-100: #ceecff;
  --color-clear-sky-200: #b2d9ff;
  --color-clear-sky-300: #8ebceb;
  --color-clear-sky-400: #6aa4d9;
  --color-clear-sky-500: #468cc7;
  --color-clear-sky-600: #3d76a8;
  --color-clear-sky-700: #305f87;
  --color-clear-sky-800: #204664;
  --color-clear-sky-900: #153046;
  --color-clear-sky-950: #061c2e;
}

SCSS

$clear-sky: #87c6ff;
$clear-sky-rgb: 135, 198, 255;
$clear-sky-light: mix(#fff, $clear-sky, 20%);
$clear-sky-dark: mix(#000, $clear-sky, 20%);

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