Dull

CSS

:root {
  --dull: #727171;
  --dull-rgb: 114 113 113;
  --dull-oklch: oklch(0.55 0.001 17.2);
}

.element {
  color: var(--dull);
  background-color: hsl(0 0% 45%);
  border-color: oklch(0.55 0.001 17.2);
}

Tailwind CSS v4

@theme {
  --color-dull: #727171;
  --color-dull-50: #f5f5f5;
  --color-dull-100: #e8e8e8;
  --color-dull-200: #d5d4d4;
  --color-dull-300: #b8b7b7;
  --color-dull-400: #9f9e9e;
  --color-dull-500: #878686;
  --color-dull-600: #727171;
  --color-dull-700: #5b5a5a;
  --color-dull-800: #434242;
  --color-dull-900: #2e2e2e;
  --color-dull-950: #1b1a1a;
}

SCSS

$dull: #727171;
$dull-rgb: 114, 113, 113;
$dull-light: mix(#fff, $dull, 20%);
$dull-dark: mix(#000, $dull, 20%);

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