#979C92

CSS

:root {
  --concrete-jungle: #979c92;
  --concrete-jungle-rgb: 151 156 146;
  --concrete-jungle-oklch: oklch(0.686 0.015 128.7);
}

.element {
  color: var(--concrete-jungle);
  background-color: hsl(90 5% 59%);
  border-color: oklch(0.686 0.015 128.7);
}

Tailwind CSS v4

@theme {
  --color-concrete-jungle: #979c92;
  --color-concrete-jungle-50: #f3f6f1;
  --color-concrete-jungle-100: #e6e9e4;
  --color-concrete-jungle-200: #d2d6cf;
  --color-concrete-jungle-300: #b5b9b1;
  --color-concrete-jungle-400: #9ca097;
  --color-concrete-jungle-500: #83887e;
  --color-concrete-jungle-600: #6f736a;
  --color-concrete-jungle-700: #595c55;
  --color-concrete-jungle-800: #41433e;
  --color-concrete-jungle-900: #2d2f2a;
  --color-concrete-jungle-950: #1a1b18;
}

SCSS

$concrete-jungle: #979c92;
$concrete-jungle-rgb: 151, 156, 146;
$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);
}