#717674

CSS

:root {
  --volcanic-ash: #717674;
  --volcanic-ash-rgb: 113 118 116;
  --volcanic-ash-oklch: oklch(0.561 0.007 170.3);
}

.element {
  color: var(--volcanic-ash);
  background-color: hsl(156 2% 45%);
  border-color: oklch(0.561 0.007 170.3);
}

Tailwind CSS v4

@theme {
  --color-volcanic-ash: #717674;
  --color-volcanic-ash-50: #f3f6f5;
  --color-volcanic-ash-100: #e6e8e7;
  --color-volcanic-ash-200: #d1d5d4;
  --color-volcanic-ash-300: #b4b8b7;
  --color-volcanic-ash-400: #9ba09e;
  --color-volcanic-ash-500: #828885;
  --color-volcanic-ash-600: #6e7371;
  --color-volcanic-ash-700: #585c5a;
  --color-volcanic-ash-800: #404342;
  --color-volcanic-ash-900: #2c2e2d;
  --color-volcanic-ash-950: #191b1a;
}

SCSS

$volcanic-ash: #717674;
$volcanic-ash-rgb: 113, 118, 116;
$volcanic-ash-light: mix(#fff, $volcanic-ash, 20%);
$volcanic-ash-dark: mix(#000, $volcanic-ash, 20%);

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