#9B9C8B

CSS

:root {
  --concrete-jungle: #9b9c8b;
  --concrete-jungle-rgb: 155 156 139;
  --concrete-jungle-oklch: oklch(0.687 0.024 109.8);
}

.element {
  color: var(--concrete-jungle);
  background-color: hsl(64 8% 58%);
  border-color: oklch(0.687 0.024 109.8);
}

Tailwind CSS v4

@theme {
  --color-concrete-jungle: #9b9c8b;
  --color-concrete-jungle-50: #f5f6ee;
  --color-concrete-jungle-100: #e8e9e0;
  --color-concrete-jungle-200: #d4d5ca;
  --color-concrete-jungle-300: #b7b9ab;
  --color-concrete-jungle-400: #9fa090;
  --color-concrete-jungle-500: #878876;
  --color-concrete-jungle-600: #727364;
  --color-concrete-jungle-700: #5b5c50;
  --color-concrete-jungle-800: #43433a;
  --color-concrete-jungle-900: #2e2e27;
  --color-concrete-jungle-950: #1b1b16;
}

SCSS

$concrete-jungle: #9b9c8b;
$concrete-jungle-rgb: 155, 156, 139;
$concrete-jungle-light: mix(#fff, $concrete-jungle, 20%);
$concrete-jungle-dark: mix(#000, $concrete-jungle, 20%);

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