#737577

CSS

:root {
  --lucky-grey: #737577;
  --lucky-grey-rgb: 115 117 119;
  --lucky-grey-oklch: oklch(0.561 0.004 247.9);
}

.element {
  color: var(--lucky-grey);
  background-color: hsl(210 2% 46%);
  border-color: oklch(0.561 0.004 247.9);
}

Tailwind CSS v4

@theme {
  --color-lucky-grey: #737577;
  --color-lucky-grey-50: #f4f5f6;
  --color-lucky-grey-100: #e7e8e9;
  --color-lucky-grey-200: #d3d4d6;
  --color-lucky-grey-300: #b6b7b9;
  --color-lucky-grey-400: #9d9fa1;
  --color-lucky-grey-500: #848689;
  --color-lucky-grey-600: #707274;
  --color-lucky-grey-700: #595b5c;
  --color-lucky-grey-800: #414244;
  --color-lucky-grey-900: #2d2e2f;
  --color-lucky-grey-950: #1a1b1b;
}

SCSS

$lucky-grey: #737577;
$lucky-grey-rgb: 115, 117, 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);
}