#777675

CSS

:root {
  --lucky-grey: #777675;
  --lucky-grey-rgb: 119 118 117;
  --lucky-grey-oklch: oklch(0.566 0.002 67.8);
}

.element {
  color: var(--lucky-grey);
  background-color: hsl(30 1% 46%);
  border-color: oklch(0.566 0.002 67.8);
}

Tailwind CSS v4

@theme {
  --color-lucky-grey: #777675;
  --color-lucky-grey-50: #f5f5f4;
  --color-lucky-grey-100: #e8e8e7;
  --color-lucky-grey-200: #d5d4d3;
  --color-lucky-grey-300: #b8b7b6;
  --color-lucky-grey-400: #9f9e9d;
  --color-lucky-grey-500: #878685;
  --color-lucky-grey-600: #727170;
  --color-lucky-grey-700: #5b5b5a;
  --color-lucky-grey-800: #434242;
  --color-lucky-grey-900: #2e2e2d;
  --color-lucky-grey-950: #1b1a1a;
}

SCSS

$lucky-grey: #777675;
$lucky-grey-rgb: 119, 118, 117;
$lucky-grey-light: mix(#fff, $lucky-grey, 20%);
$lucky-grey-dark: mix(#000, $lucky-grey, 20%);

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