Concrete

CSS

:root {
  --concrete: #d2d1cd;
  --concrete-rgb: 210 209 205;
  --concrete-oklch: oklch(0.86 0.006 95.1);
}

.element {
  color: var(--concrete);
  background-color: hsl(48 5% 81%);
  border-color: oklch(0.86 0.006 95.1);
}

Tailwind CSS v4

@theme {
  --color-concrete: #d2d1cd;
  --color-concrete-50: #f5f5f3;
  --color-concrete-100: #e8e8e6;
  --color-concrete-200: #d5d4d2;
  --color-concrete-300: #b8b7b4;
  --color-concrete-400: #9f9e9b;
  --color-concrete-500: #878682;
  --color-concrete-600: #72716e;
  --color-concrete-700: #5b5b58;
  --color-concrete-800: #434240;
  --color-concrete-900: #2e2e2c;
  --color-concrete-950: #1b1b19;
}

SCSS

$concrete: #d2d1cd;
$concrete-rgb: 210, 209, 205;
$concrete-light: mix(#fff, $concrete, 20%);
$concrete-dark: mix(#000, $concrete, 20%);

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