#979D8F

CSS

:root {
  --concrete-jungle: #979d8f;
  --concrete-jungle-rgb: 151 157 143;
  --concrete-jungle-oklch: oklch(0.687 0.021 126);
}

.element {
  color: var(--concrete-jungle);
  background-color: hsl(86 7% 59%);
  border-color: oklch(0.687 0.021 126);
}

Tailwind CSS v4

@theme {
  --color-concrete-jungle: #979d8f;
  --color-concrete-jungle-50: #f3f6f0;
  --color-concrete-jungle-100: #e6e9e2;
  --color-concrete-jungle-200: #d1d6cd;
  --color-concrete-jungle-300: #b4baae;
  --color-concrete-jungle-400: #9ba194;
  --color-concrete-jungle-500: #83897a;
  --color-concrete-jungle-600: #6e7467;
  --color-concrete-jungle-700: #585d52;
  --color-concrete-jungle-800: #41443c;
  --color-concrete-jungle-900: #2d2f29;
  --color-concrete-jungle-950: #1a1b17;
}

SCSS

$concrete-jungle: #979d8f;
$concrete-jungle-rgb: 151, 157, 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);
}