Up in the Air

CSS

:root {
  --up-in-the-air: #c2d5d8;
  --up-in-the-air-rgb: 194 213 216;
  --up-in-the-air-oklch: oklch(0.86 0.021 208.1);
}

.element {
  color: var(--up-in-the-air);
  background-color: hsl(188 22% 80%);
  border-color: oklch(0.86 0.021 208.1);
}

Tailwind CSS v4

@theme {
  --color-up-in-the-air: #c2d5d8;
  --color-up-in-the-air-50: #eff7f8;
  --color-up-in-the-air-100: #e0eaec;
  --color-up-in-the-air-200: #cbd7d9;
  --color-up-in-the-air-300: #acbbbd;
  --color-up-in-the-air-400: #91a2a5;
  --color-up-in-the-air-500: #778a8d;
  --color-up-in-the-air-600: #657578;
  --color-up-in-the-air-700: #505e60;
  --color-up-in-the-air-800: #3a4546;
  --color-up-in-the-air-900: #282f30;
  --color-up-in-the-air-950: #161c1d;
}

SCSS

$up-in-the-air: #c2d5d8;
$up-in-the-air-rgb: 194, 213, 216;
$up-in-the-air-light: mix(#fff, $up-in-the-air, 20%);
$up-in-the-air-dark: mix(#000, $up-in-the-air, 20%);

.element {
  color: $up-in-the-air;
  box-shadow: 0 0 0 2px rgba($up-in-the-air, 0.35);
}