#A6B4A7

CSS

:root {
  --alpine-air: #a6b4a7;
  --alpine-air-rgb: 166 180 167;
  --alpine-air-oklch: oklch(0.755 0.024 147.4);
}

.element {
  color: var(--alpine-air);
  background-color: hsl(124 9% 68%);
  border-color: oklch(0.755 0.024 147.4);
}

Tailwind CSS v4

@theme {
  --color-alpine-air: #a6b4a7;
  --color-alpine-air-50: #f1f7f1;
  --color-alpine-air-100: #e3eae4;
  --color-alpine-air-200: #cdd7cf;
  --color-alpine-air-300: #afbbb1;
  --color-alpine-air-400: #95a396;
  --color-alpine-air-500: #7c8b7d;
  --color-alpine-air-600: #69756a;
  --color-alpine-air-700: #545e55;
  --color-alpine-air-800: #3d453d;
  --color-alpine-air-900: #2a2f2a;
  --color-alpine-air-950: #181c18;
}

SCSS

$alpine-air: #a6b4a7;
$alpine-air-rgb: 166, 180, 167;
$alpine-air-light: mix(#fff, $alpine-air, 20%);
$alpine-air-dark: mix(#000, $alpine-air, 20%);

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