#747777

CSS

:root {
  --lucky-grey: #747777;
  --lucky-grey-rgb: 116 119 119;
  --lucky-grey-oklch: oklch(0.567 0.004 197.1);
}

.element {
  color: var(--lucky-grey);
  background-color: hsl(180 1% 46%);
  border-color: oklch(0.567 0.004 197.1);
}

Tailwind CSS v4

@theme {
  --color-lucky-grey: #747777;
  --color-lucky-grey-50: #f4f5f5;
  --color-lucky-grey-100: #e6e8e8;
  --color-lucky-grey-200: #d2d5d5;
  --color-lucky-grey-300: #b5b8b8;
  --color-lucky-grey-400: #9c9f9f;
  --color-lucky-grey-500: #838787;
  --color-lucky-grey-600: #6f7272;
  --color-lucky-grey-700: #595b5b;
  --color-lucky-grey-800: #414343;
  --color-lucky-grey-900: #2d2e2e;
  --color-lucky-grey-950: #1a1b1b;
}

SCSS

$lucky-grey: #747777;
$lucky-grey-rgb: 116, 119, 119;
$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);
}