#9C9B8F

CSS

:root {
  --concrete-jungle: #9c9b8f;
  --concrete-jungle-rgb: 156 155 143;
  --concrete-jungle-oklch: oklch(0.687 0.017 103);
}

.element {
  color: var(--concrete-jungle);
  background-color: hsl(55 6% 59%);
  border-color: oklch(0.687 0.017 103);
}

Tailwind CSS v4

@theme {
  --color-concrete-jungle: #9c9b8f;
  --color-concrete-jungle-50: #f6f5f0;
  --color-concrete-jungle-100: #e8e8e2;
  --color-concrete-jungle-200: #d5d5cc;
  --color-concrete-jungle-300: #b8b8ae;
  --color-concrete-jungle-400: #a09f94;
  --color-concrete-jungle-500: #88877a;
  --color-concrete-jungle-600: #737267;
  --color-concrete-jungle-700: #5c5b53;
  --color-concrete-jungle-800: #43433c;
  --color-concrete-jungle-900: #2f2e29;
  --color-concrete-jungle-950: #1b1b17;
}

SCSS

$concrete-jungle: #9c9b8f;
$concrete-jungle-rgb: 156, 155, 143;
$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);
}