Winter Flannel

CSS

:root {
  --winter-flannel: #9ca4a5;
  --winter-flannel-rgb: 156 164 165;
  --winter-flannel-oklch: oklch(0.713 0.009 205.9);
}

.element {
  color: var(--winter-flannel);
  background-color: hsl(187 5% 63%);
  border-color: oklch(0.713 0.009 205.9);
}

Tailwind CSS v4

@theme {
  --color-winter-flannel: #9ca4a5;
  --color-winter-flannel-50: #f2f6f6;
  --color-winter-flannel-100: #e4e9e9;
  --color-winter-flannel-200: #d0d5d6;
  --color-winter-flannel-300: #b2b9ba;
  --color-winter-flannel-400: #98a0a1;
  --color-winter-flannel-500: #7f8889;
  --color-winter-flannel-600: #6c7374;
  --color-winter-flannel-700: #565c5d;
  --color-winter-flannel-800: #3f4344;
  --color-winter-flannel-900: #2b2e2f;
  --color-winter-flannel-950: #191b1b;
}

SCSS

$winter-flannel: #9ca4a5;
$winter-flannel-rgb: 156, 164, 165;
$winter-flannel-light: mix(#fff, $winter-flannel, 20%);
$winter-flannel-dark: mix(#000, $winter-flannel, 20%);

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