#D6E6E7

CSS

:root {
  --smoke-and-mirrors: #d6e6e7;
  --smoke-and-mirrors-rgb: 214 230 231;
  --smoke-and-mirrors-oklch: oklch(0.913 0.017 201.4);
}

.element {
  color: var(--smoke-and-mirrors);
  background-color: hsl(184 26% 87%);
  border-color: oklch(0.913 0.017 201.4);
}

Tailwind CSS v4

@theme {
  --color-smoke-and-mirrors: #d6e6e7;
  --color-smoke-and-mirrors-50: #f0f7f7;
  --color-smoke-and-mirrors-100: #e2eaea;
  --color-smoke-and-mirrors-200: #ccd6d7;
  --color-smoke-and-mirrors-300: #aebabb;
  --color-smoke-and-mirrors-400: #93a2a3;
  --color-smoke-and-mirrors-500: #7a8a8b;
  --color-smoke-and-mirrors-600: #677575;
  --color-smoke-and-mirrors-700: #525d5e;
  --color-smoke-and-mirrors-800: #3c4445;
  --color-smoke-and-mirrors-900: #292f2f;
  --color-smoke-and-mirrors-950: #171c1c;
}

SCSS

$smoke-and-mirrors: #d6e6e7;
$smoke-and-mirrors-rgb: 214, 230, 231;
$smoke-and-mirrors-light: mix(#fff, $smoke-and-mirrors, 20%);
$smoke-and-mirrors-dark: mix(#000, $smoke-and-mirrors, 20%);

.element {
  color: $smoke-and-mirrors;
  box-shadow: 0 0 0 2px rgba($smoke-and-mirrors, 0.35);
}