#6D767D

CSS

:root {
  --volcanic-ash: #6d767d;
  --volcanic-ash-rgb: 109 118 125;
  --volcanic-ash-oklch: oklch(0.561 0.015 241.1);
}

.element {
  color: var(--volcanic-ash);
  background-color: hsl(206 7% 46%);
  border-color: oklch(0.561 0.015 241.1);
}

Tailwind CSS v4

@theme {
  --color-volcanic-ash: #6d767d;
  --color-volcanic-ash-50: #f1f6f9;
  --color-volcanic-ash-100: #e4e9ed;
  --color-volcanic-ash-200: #cfd5da;
  --color-volcanic-ash-300: #b1b8bf;
  --color-volcanic-ash-400: #97a0a7;
  --color-volcanic-ash-500: #7e8890;
  --color-volcanic-ash-600: #6a7379;
  --color-volcanic-ash-700: #555c61;
  --color-volcanic-ash-800: #3e4347;
  --color-volcanic-ash-900: #2a2e31;
  --color-volcanic-ash-950: #181b1d;
}

SCSS

$volcanic-ash: #6d767d;
$volcanic-ash-rgb: 109, 118, 125;
$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);
}