#6F7675

CSS

:root {
  --volcanic-ash: #6f7675;
  --volcanic-ash-rgb: 111 118 117;
  --volcanic-ash-oklch: oklch(0.56 0.009 186.7);
}

.element {
  color: var(--volcanic-ash);
  background-color: hsl(171 3% 45%);
  border-color: oklch(0.56 0.009 186.7);
}

Tailwind CSS v4

@theme {
  --color-volcanic-ash: #6f7675;
  --color-volcanic-ash-50: #f2f6f5;
  --color-volcanic-ash-100: #e5e9e8;
  --color-volcanic-ash-200: #d0d5d5;
  --color-volcanic-ash-300: #b3b9b8;
  --color-volcanic-ash-400: #99a09f;
  --color-volcanic-ash-500: #808887;
  --color-volcanic-ash-600: #6d7372;
  --color-volcanic-ash-700: #575c5b;
  --color-volcanic-ash-800: #3f4343;
  --color-volcanic-ash-900: #2c2e2e;
  --color-volcanic-ash-950: #191b1b;
}

SCSS

$volcanic-ash: #6f7675;
$volcanic-ash-rgb: 111, 118, 117;
$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);
}