Blue Smoke

CSS

:root {
  --blue-smoke: #d7e0e2;
  --blue-smoke-rgb: 215 224 226;
  --blue-smoke-oklch: oklch(0.9 0.01 212.5);
}

.element {
  color: var(--blue-smoke);
  background-color: hsl(191 16% 86%);
  border-color: oklch(0.9 0.01 212.5);
}

Tailwind CSS v4

@theme {
  --color-blue-smoke: #d7e0e2;
  --color-blue-smoke-50: #f2f6f7;
  --color-blue-smoke-100: #e4e9ea;
  --color-blue-smoke-200: #d0d5d7;
  --color-blue-smoke-300: #b2b9ba;
  --color-blue-smoke-400: #98a0a2;
  --color-blue-smoke-500: #7f888a;
  --color-blue-smoke-600: #6c7375;
  --color-blue-smoke-700: #565c5d;
  --color-blue-smoke-800: #3f4344;
  --color-blue-smoke-900: #2b2e2f;
  --color-blue-smoke-950: #181b1c;
}

SCSS

$blue-smoke: #d7e0e2;
$blue-smoke-rgb: 215, 224, 226;
$blue-smoke-light: mix(#fff, $blue-smoke, 20%);
$blue-smoke-dark: mix(#000, $blue-smoke, 20%);

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