#6C6C6F

CSS

:root {
  --paris-paving: #6c6c6f;
  --paris-paving-rgb: 108 108 111;
  --paris-paving-oklch: oklch(0.532 0.005 286.2);
}

.element {
  color: var(--paris-paving);
  background-color: hsl(240 1% 43%);
  border-color: oklch(0.532 0.005 286.2);
}

Tailwind CSS v4

@theme {
  --color-paris-paving: #6c6c6f;
  --color-paris-paving-50: #f5f5f6;
  --color-paris-paving-100: #e8e7e9;
  --color-paris-paving-200: #d4d4d6;
  --color-paris-paving-300: #b7b7ba;
  --color-paris-paving-400: #9e9ea1;
  --color-paris-paving-500: #868689;
  --color-paris-paving-600: #717174;
  --color-paris-paving-700: #5a5a5d;
  --color-paris-paving-800: #424244;
  --color-paris-paving-900: #2e2e2f;
  --color-paris-paving-950: #1a1a1b;
}

SCSS

$paris-paving: #6c6c6f;
$paris-paving-rgb: 108, 108, 111;
$paris-paving-light: mix(#fff, $paris-paving, 20%);
$paris-paving-dark: mix(#000, $paris-paving, 20%);

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