#979C91

CSS

:root {
  --concrete-jungle: #979c91;
  --concrete-jungle-rgb: 151 156 145;
  --concrete-jungle-oklch: oklch(0.685 0.017 126.9);
}

.element {
  color: var(--concrete-jungle);
  background-color: hsl(87 5% 59%);
  border-color: oklch(0.685 0.017 126.9);
}

Tailwind CSS v4

@theme {
  --color-concrete-jungle: #979c91;
  --color-concrete-jungle-50: #f4f6f1;
  --color-concrete-jungle-100: #e6e9e3;
  --color-concrete-jungle-200: #d2d6ce;
  --color-concrete-jungle-300: #b5b9b0;
  --color-concrete-jungle-400: #9ca096;
  --color-concrete-jungle-500: #83887d;
  --color-concrete-jungle-600: #6f736a;
  --color-concrete-jungle-700: #595c54;
  --color-concrete-jungle-800: #41433d;
  --color-concrete-jungle-900: #2d2f2a;
  --color-concrete-jungle-950: #1a1b18;
}

SCSS

$concrete-jungle: #979c91;
$concrete-jungle-rgb: 151, 156, 145;
$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);
}