#6D767B

CSS

:root {
  --volcanic-ash: #6d767b;
  --volcanic-ash-rgb: 109 118 123;
  --volcanic-ash-oklch: oklch(0.56 0.013 231.8);
}

.element {
  color: var(--volcanic-ash);
  background-color: hsl(201 6% 45%);
  border-color: oklch(0.56 0.013 231.8);
}

Tailwind CSS v4

@theme {
  --color-volcanic-ash: #6d767b;
  --color-volcanic-ash-50: #f2f6f8;
  --color-volcanic-ash-100: #e4e9ec;
  --color-volcanic-ash-200: #cfd5d9;
  --color-volcanic-ash-300: #b1b9bd;
  --color-volcanic-ash-400: #97a0a5;
  --color-volcanic-ash-500: #7e888e;
  --color-volcanic-ash-600: #6b7378;
  --color-volcanic-ash-700: #555c60;
  --color-volcanic-ash-800: #3e4346;
  --color-volcanic-ash-900: #2b2e31;
  --color-volcanic-ash-950: #181b1d;
}

SCSS

$volcanic-ash: #6d767b;
$volcanic-ash-rgb: 109, 118, 123;
$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);
}