#8FCAFF

CSS

:root {
  --clear-sky: #8fcaff;
  --clear-sky-rgb: 143 202 255;
  --clear-sky-oklch: oklch(0.818 0.097 246.4);
}

.element {
  color: var(--clear-sky);
  background-color: hsl(208 100% 78%);
  border-color: oklch(0.818 0.097 246.4);
}

Tailwind CSS v4

@theme {
  --color-clear-sky: #8fcaff;
  --color-clear-sky-50: #e0f8ff;
  --color-clear-sky-100: #d0ebff;
  --color-clear-sky-200: #b5d9fc;
  --color-clear-sky-300: #90bce7;
  --color-clear-sky-400: #6ea4d5;
  --color-clear-sky-500: #4c8cc2;
  --color-clear-sky-600: #4176a4;
  --color-clear-sky-700: #345f84;
  --color-clear-sky-800: #224661;
  --color-clear-sky-900: #173044;
  --color-clear-sky-950: #081c2c;
}

SCSS

$clear-sky: #8fcaff;
$clear-sky-rgb: 143, 202, 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);
}